Str.php

<?php

namespace Illuminate\Support;

use Closure;
use Illuminate\Support\Traits\Macroable;
use JsonException;
use League\CommonMark\Environment\Environment;
use League\CommonMark\Extension\GithubFlavoredMarkdownExtension;
use League\CommonMark\Extension\InlinesOnly\InlinesOnlyExtension;
use League\CommonMark\GithubFlavoredMarkdownConverter;
use League\CommonMark\MarkdownConverter;
use Ramsey\Uuid\Codec\TimestampFirstCombCodec;
use Ramsey\Uuid\Generator\CombGenerator;
use Ramsey\Uuid\Uuid;
use Ramsey\Uuid\UuidFactory;
use Symfony\Component\Uid\Ulid;
use Throwable;
use Traversable;
use voku\helper\ASCII;

class Str
{
    use Macroable;

    /**
     * The cache of snake-cased words.
     *
     * @var array
     */
    protected static $snakeCache = [];

    /**
     * The cache of camel-cased words.
     *
     * @var array
     */
    protected static $camelCache = [];

    /**
     * The cache of studly-cased words.
     *
     * @var array
     */
    protected static $studlyCache = [];

    /**
     * The callback that should be used to generate UUIDs.
     *
     * @var callable|null
     */
    protected static $uuidFactory;

    /**
     * The callback that should be used to generate ULIDs.
     *
     * @var callable|null
     */
    protected static $ulidFactory;

    /**
     * The callback that should be used to generate random strings.
     *
     * @var callable|null
     */
    protected static $randomStringFactory;

    /**
     * Get a new stringable object from the given string.
     *
     * @param  string  $string
     * @return \Illuminate\Support\Stringable
     */
    public static function of($string)
    {
        return new Stringable($string);
    }

    /**
     * Return the remainder of a string after the first occurrence of a given value.
     *
     * @param  string  $subject
     * @param  string  $search
     * @return string
     */
    public static function after($subject, $search)
    {
        return $search === '' ? $subject : array_reverse(explode($search, $subject, 2))[0];
    }

    /**
     * Return the remainder of a string after the last occurrence of a given value.
     *
     * @param  string  $subject
     * @param  string  $search
     * @return string
     */
    public static function afterLast($subject, $search)
    {
        if ($search === '') {
            return $subject;
        }

        $position = strrpos($subject, (string) $search);

        if ($position === false) {
            return $subject;
        }

        return substr($subject, $position + strlen($search));
    }

    /**
     * Transliterate a UTF-8 value to ASCII.
     *
     * @param  string  $value
     * @param  string  $language
     * @return string
     */
    public static function ascii($value, $language = 'en')
    {
        return ASCII::to_ascii((string) $value, $language, replace_single_chars_only: false);
    }

    /**
     * Transliterate a string to its closest ASCII representation.
     *
     * @param  string  $string
     * @param  string|null  $unknown
     * @param  bool|null  $strict
     * @return string
     */
    public static function transliterate($string, $unknown = '?', $strict = false)
    {
        return ASCII::to_transliterate($string, $unknown, $strict);
    }

    /**
     * Get the portion of a string before the first occurrence of a given value.
     *
     * @param  string  $subject
     * @param  string  $search
     * @return string
     */
    public static function before($subject, $search)
    {
        if ($search === '') {
            return $subject;
        }

        $result = strstr($subject, (string) $search, true);

        return $result === false ? $subject : $result;
    }

    /**
     * Get the portion of a string before the last occurrence of a given value.
     *
     * @param  string  $subject
     * @param  string  $search
     * @return string
     */
    public static function beforeLast($subject, $search)
    {
        if ($search === '') {
            return $subject;
        }

        $pos = mb_strrpos($subject, $search);

        if ($pos === false) {
            return $subject;
        }

        return static::substr($subject, 0, $pos);
    }

    /**
     * Get the portion of a string between two given values.
     *
     * @param  string  $subject
     * @param  string  $from
     * @param  string  $to
     * @return string
     */
    public static function between($subject, $from, $to)
    {
        if ($from === '' || $to === '') {
            return $subject;
        }

        return static::beforeLast(static::after($subject, $from), $to);
    }

    /**
     * Get the smallest possible portion of a string between two given values.
     *
     * @param  string  $subject
     * @param  string  $from
     * @param  string  $to
     * @return string
     */
    public static function betweenFirst($subject, $from, $to)
    {
        if ($from === '' || $to === '') {
            return $subject;
        }

        return static::before(static::after($subject, $from), $to);
    }

    /**
     * Convert a value to camel case.
     *
     * @param  string  $value
     * @return string
     */
    public static function camel($value)
    {
        if (isset(static::$camelCache[$value])) {
            return static::$camelCache[$value];
        }

        return static::$camelCache[$value] = lcfirst(static::studly($value));
    }

    /**
     * Get the character at the specified index.
     *
     * @param  string  $subject
     * @param  int  $index
     * @return string|false
     */
    public static function charAt($subject, $index)
    {
        $length = mb_strlen($subject);

        if ($index < 0 ? $index < -$length : $index > $length - 1) {
            return false;
        }

        return mb_substr($subject, $index, 1);
    }

    /**
     * Remove the given string(s) if it exists at the start of the haystack.
     *
     * @param  string  $subject
     * @param  string|array  $needle
     * @return string
     */
    public static function chopStart($subject, $needle)
    {
        foreach ((array) $needle as $n) {
            if (str_starts_with($subject, $n)) {
                return substr($subject, strlen($n));
            }
        }

        return $subject;
    }

    /**
     * Remove the given string(s) if it exists at the end of the haystack.
     *
     * @param  string  $subject
     * @param  string|array  $needle
     * @return string
     */
    public static function chopEnd($subject, $needle)
    {
        foreach ((array) $needle as $n) {
            if (str_ends_with($subject, $n)) {
                return substr($subject, 0, -strlen($n));
            }
        }

        return $subject;
    }

    /**
     * Determine if a given string contains a given substring.
     *
     * @param  string  $haystack
     * @param  string|iterable<string>  $needles
     * @param  bool  $ignoreCase
     * @return bool
     */
    public static function contains($haystack, $needles, $ignoreCase = false)
    {
        if ($ignoreCase) {
            $haystack = mb_strtolower($haystack);
        }

        if (! is_iterable($needles)) {
            $needles = (array) $needles;
        }

        foreach ($needles as $needle) {
            if ($ignoreCase) {
                $needle = mb_strtolower($needle);
            }

            if ($needle !== '' && str_contains($haystack, $needle)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Determine if a given string contains all array values.
     *
     * @param  string  $haystack
     * @param  iterable<string>  $needles
     * @param  bool  $ignoreCase
     * @return bool
     */
    public static function containsAll($haystack, $needles, $ignoreCase = false)
    {
        foreach ($needles as $needle) {
            if (! static::contains($haystack, $needle, $ignoreCase)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Determine if a given string doesn't contain a given substring.
     *
     * @param  string  $haystack
     * @param  string|iterable<string>  $needles
     * @param  bool  $ignoreCase
     * @return bool
     */
    public static function doesntContain($haystack, $needles, $ignoreCase = false)
    {
        return ! static::contains($haystack, $needles, $ignoreCase);
    }

    /**
     * Convert the case of a string.
     *
     * @param  string  $string
     * @param  int  $mode
     * @param  string|null  $encoding
     * @return string
     */
    public static function convertCase(string $string, int $mode = MB_CASE_FOLD, ?string $encoding = 'UTF-8')
    {
        return mb_convert_case($string, $mode, $encoding);
    }

    /**
     * Replace consecutive instances of a given character with a single character in the given string.
     *
     * @param  string  $string
     * @param  string  $character
     * @return string
     */
    public static function deduplicate(string $string, string $character = ' ')
    {
        return preg_replace('/'.preg_quote($character, '/').'+/u', $character, $string);
    }

    /**
     * Determine if a given string ends with a given substring.
     *
     * @param  string  $haystack
     * @param  string|iterable<string>  $needles
     * @return bool
     */
    public static function endsWith($haystack, $needles)
    {
        if (! is_iterable($needles)) {
            $needles = (array) $needles;
        }

        foreach ($needles as $needle) {
            if ((string) $needle !== '' && str_ends_with($haystack, $needle)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Extracts an excerpt from text that matches the first instance of a phrase.
     *
     * @param  string  $text
     * @param  string  $phrase
     * @param  array  $options
     * @return string|null
     */
    public static function excerpt($text, $phrase = '', $options = [])
    {
        $radius = $options['radius'] ?? 100;
        $omission = $options['omission'] ?? '...';

        preg_match('/^(.*?)('.preg_quote((string) $phrase, '/').')(.*)$/iu', (string) $text, $matches);

        if (empty($matches)) {
            return null;
        }

        $start = ltrim($matches[1]);

        $start = Str::of(mb_substr($start, max(mb_strlen($start, 'UTF-8') - $radius, 0), $radius, 'UTF-8'))->ltrim()->unless(
            fn ($startWithRadius) => $startWithRadius->exactly($start),
            fn ($startWithRadius) => $startWithRadius->prepend($omission),
        );

        $end = rtrim($matches[3]);

        $end = Str::of(mb_substr($end, 0, $radius, 'UTF-8'))->rtrim()->unless(
            fn ($endWithRadius) => $endWithRadius->exactly($end),
            fn ($endWithRadius) => $endWithRadius->append($omission),
        );

        return $start->append($matches[2], $end)->toString();
    }

    /**
     * Cap a string with a single instance of a given value.
     *
     * @param  string  $value
     * @param  string  $cap
     * @return string
     */
    public static function finish($value, $cap)
    {
        $quoted = preg_quote($cap, '/');

        return preg_replace('/(?:'.$quoted.')+$/u', '', $value).$cap;
    }

    /**
     * Wrap the string with the given strings.
     *
     * @param  string  $value
     * @param  string  $before
     * @param  string|null  $after
     * @return string
     */
    public static function wrap($value, $before, $after = null)
    {
        return $before.$value.($after ??= $before);
    }

    /**
     * Unwrap the string with the given strings.
     *
     * @param  string  $value
     * @param  string  $before
     * @param  string|null  $after
     * @return string
     */
    public static function unwrap($value, $before, $after = null)
    {
        if (static::startsWith($value, $before)) {
            $value = static::substr($value, static::length($before));
        }

        if (static::endsWith($value, $after ??= $before)) {
            $value = static::substr($value, 0, -static::length($after));
        }

        return $value;
    }

    /**
     * Determine if a given string matches a given pattern.
     *
     * @param  string|iterable<string>  $pattern
     * @param  string  $value
     * @param  bool  $ignoreCase
     * @return bool
     */
    public static function is($pattern, $value, $ignoreCase = false)
    {
        $value = (string) $value;

        if (! is_iterable($pattern)) {
            $pattern = [$pattern];
        }

        foreach ($pattern as $pattern) {
            $pattern = (string) $pattern;

            // If the given value is an exact match we can of course return true right
            // from the beginning. Otherwise, we will translate asterisks and do an
            // actual pattern match against the two strings to see if they match.
            if ($pattern === $value) {
                return true;
            }

            if ($ignoreCase && mb_strtolower($pattern) === mb_strtolower($value)) {
                return true;
            }

            $pattern = preg_quote($pattern, '#');

            // Asterisks are translated into zero-or-more regular expression wildcards
            // to make it convenient to check if the strings starts with the given
            // pattern such as "library/*", making any string check convenient.
            $pattern = str_replace('\*', '.*', $pattern);

            if (preg_match('#^'.$pattern.'\z#'.($ignoreCase ? 'iu' : 'u'), $value) === 1) {
                return true;
            }
        }

        return false;
    }

    /**
     * Determine if a given string is 7 bit ASCII.
     *
     * @param  string  $value
     * @return bool
     */
    public static function isAscii($value)
    {
        return ASCII::is_ascii((string) $value);
    }

    /**
     * Determine if a given value is valid JSON.
     *
     * @param  mixed  $value
     * @return bool
     */
    public static function isJson($value)
    {
        if (! is_string($value)) {
            return false;
        }

        if (function_exists('json_validate')) {
            return json_validate($value, 512);
        }

        try {
            json_decode($value, true, 512, JSON_THROW_ON_ERROR);
        } catch (JsonException) {
            return false;
        }

        return true;
    }

    /**
     * Determine if a given value is a valid URL.
     *
     * @param  mixed  $value
     * @param  array  $protocols
     * @return bool
     */
    public static function isUrl($value, array $protocols = [])
    {
        if (! is_string($value)) {
            return false;
        }

        $protocolList = empty($protocols)
            ? 'aaa|aaas|about|acap|acct|acd|acr|adiumxtra|adt|afp|afs|aim|amss|android|appdata|apt|ark|attachment|aw|barion|beshare|bitcoin|bitcoincash|blob|bolo|browserext|calculator|callto|cap|cast|casts|chrome|chrome-extension|cid|coap|coap\+tcp|coap\+ws|coaps|coaps\+tcp|coaps\+ws|com-eventbrite-attendee|content|conti|crid|cvs|dab|data|dav|diaspora|dict|did|dis|dlna-playcontainer|dlna-playsingle|dns|dntp|dpp|drm|drop|dtn|dvb|ed2k|elsi|example|facetime|fax|feed|feedready|file|filesystem|finger|first-run-pen-experience|fish|fm|ftp|fuchsia-pkg|geo|gg|git|gizmoproject|go|gopher|graph|gtalk|h323|ham|hcap|hcp|http|https|hxxp|hxxps|hydrazone|iax|icap|icon|im|imap|info|iotdisco|ipn|ipp|ipps|irc|irc6|ircs|iris|iris\.beep|iris\.lwz|iris\.xpc|iris\.xpcs|isostore|itms|jabber|jar|jms|keyparc|lastfm|ldap|ldaps|leaptofrogans|lorawan|lvlt|magnet|mailserver|mailto|maps|market|message|mid|mms|modem|mongodb|moz|ms-access|ms-browser-extension|ms-calculator|ms-drive-to|ms-enrollment|ms-excel|ms-eyecontrolspeech|ms-gamebarservices|ms-gamingoverlay|ms-getoffice|ms-help|ms-infopath|ms-inputapp|ms-lockscreencomponent-config|ms-media-stream-id|ms-mixedrealitycapture|ms-mobileplans|ms-officeapp|ms-people|ms-project|ms-powerpoint|ms-publisher|ms-restoretabcompanion|ms-screenclip|ms-screensketch|ms-search|ms-search-repair|ms-secondary-screen-controller|ms-secondary-screen-setup|ms-settings|ms-settings-airplanemode|ms-settings-bluetooth|ms-settings-camera|ms-settings-cellular|ms-settings-cloudstorage|ms-settings-connectabledevices|ms-settings-displays-topology|ms-settings-emailandaccounts|ms-settings-language|ms-settings-location|ms-settings-lock|ms-settings-nfctransactions|ms-settings-notifications|ms-settings-power|ms-settings-privacy|ms-settings-proximity|ms-settings-screenrotation|ms-settings-wifi|ms-settings-workplace|ms-spd|ms-sttoverlay|ms-transit-to|ms-useractivityset|ms-virtualtouchpad|ms-visio|ms-walk-to|ms-whiteboard|ms-whiteboard-cmd|ms-word|msnim|msrp|msrps|mss|mtqp|mumble|mupdate|mvn|news|nfs|ni|nih|nntp|notes|ocf|oid|onenote|onenote-cmd|opaquelocktoken|openpgp4fpr|pack|palm|paparazzi|payto|pkcs11|platform|pop|pres|prospero|proxy|pwid|psyc|pttp|qb|query|redis|rediss|reload|res|resource|rmi|rsync|rtmfp|rtmp|rtsp|rtsps|rtspu|s3|secondlife|service|session|sftp|sgn|shttp|sieve|simpleledger|sip|sips|skype|smb|sms|smtp|snews|snmp|soap\.beep|soap\.beeps|soldat|spiffe|spotify|ssh|steam|stun|stuns|submit|svn|tag|teamspeak|tel|teliaeid|telnet|tftp|tg|things|thismessage|tip|tn3270|tool|ts3server|turn|turns|tv|udp|unreal|urn|ut2004|v-event|vemmi|ventrilo|videotex|vnc|view-source|wais|webcal|wpid|ws|wss|wtai|wyciwyg|xcon|xcon-userid|xfire|xmlrpc\.beep|xmlrpc\.beeps|xmpp|xri|ymsgr|z39\.50|z39\.50r|z39\.50s'
            : implode('|', $protocols);

        /*
         * This pattern is derived from Symfony\Component\Validator\Constraints\UrlValidator (5.0.7).
         *
         * (c) Fabien Potencier <fabien@symfony.com> http://symfony.com
         */
        $pattern = '~^
            (LARAVEL_PROTOCOLS)://                                 # protocol
            (((?:[\_\.\pL\pN-]|%[0-9A-Fa-f]{2})+:)?((?:[\_\.\pL\pN-]|%[0-9A-Fa-f]{2})+)@)?  # basic auth
            (
                ([\pL\pN\pS\-\_\.])+(\.?([\pL\pN]|xn\-\-[\pL\pN-]+)+\.?) # a domain name
                    |                                                 # or
                \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}                    # an IP address
                    |                                                 # or
                \[
                    (?:(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){6})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:::(?:(?:(?:[0-9a-f]{1,4})):){5})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){4})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,1}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){3})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,2}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){2})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,3}(?:(?:[0-9a-f]{1,4})))?::(?:(?:[0-9a-f]{1,4})):)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,4}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,5}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,6}(?:(?:[0-9a-f]{1,4})))?::))))
                \]  # an IPv6 address
            )
            (:[0-9]+)?                              # a port (optional)
            (?:/ (?:[\pL\pN\-._\~!$&\'()*+,;=:@]|%[0-9A-Fa-f]{2})* )*          # a path
            (?:\? (?:[\pL\pN\-._\~!$&\'\[\]()*+,;=:@/?]|%[0-9A-Fa-f]{2})* )?   # a query (optional)
            (?:\# (?:[\pL\pN\-._\~!$&\'()*+,;=:@/?]|%[0-9A-Fa-f]{2})* )?       # a fragment (optional)
        $~ixu';

        return preg_match(str_replace('LARAVEL_PROTOCOLS', $protocolList, $pattern), $value) > 0;
    }

    /**
     * Determine if a given value is a valid UUID.
     *
     * @param  mixed  $value
     * @return bool
     */
    public static function isUuid($value)
    {
        if (! is_string($value)) {
            return false;
        }

        return preg_match('/^[\da-fA-F]{8}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{12}$/D', $value) > 0;
    }

    /**
     * Determine if a given value is a valid ULID.
     *
     * @param  mixed  $value
     * @return bool
     */
    public static function isUlid($value)
    {
        if (! is_string($value)) {
            return false;
        }

        return Ulid::isValid($value);
    }

    /**
     * Convert a string to kebab case.
     *
     * @param  string  $value
     * @return string
     */
    public static function kebab($value)
    {
        return static::snake($value, '-');
    }

    /**
     * Return the length of the given string.
     *
     * @param  string  $value
     * @param  string|null  $encoding
     * @return int
     */
    public static function length($value, $encoding = null)
    {
        return mb_strlen($value, $encoding);
    }

    /**
     * Limit the number of characters in a string.
     *
     * @param  string  $value
     * @param  int  $limit
     * @param  string  $end
     * @param  bool  $preserveWords
     * @return string
     */
    public static function limit($value, $limit = 100, $end = '...', $preserveWords = false)
    {
        if (mb_strwidth($value, 'UTF-8') <= $limit) {
            return $value;
        }

        if (! $preserveWords) {
            return rtrim(mb_strimwidth($value, 0, $limit, '', 'UTF-8')).$end;
        }

        $value = trim(preg_replace('/[\n\r]+/', ' ', strip_tags($value)));

        $trimmed = rtrim(mb_strimwidth($value, 0, $limit, '', 'UTF-8'));

        if (mb_substr($value, $limit, 1, 'UTF-8') === ' ') {
            return $trimmed.$end;
        }

        return preg_replace("/(.*)\s.*/", '$1', $trimmed).$end;
    }

    /**
     * Convert the given string to lower-case.
     *
     * @param  string  $value
     * @return string
     */
    public static function lower($value)
    {
        return mb_strtolower($value, 'UTF-8');
    }

    /**
     * Limit the number of words in a string.
     *
     * @param  string  $value
     * @param  int  $words
     * @param  string  $end
     * @return string
     */
    public static function words($value, $words = 100, $end = '...')
    {
        preg_match('/^\s*+(?:\S++\s*+){1,'.$words.'}/u', $value, $matches);

        if (! isset($matches[0]) || static::length($value) === static::length($matches[0])) {
            return $value;
        }

        return rtrim($matches[0]).$end;
    }

    /**
     * Converts GitHub flavored Markdown into HTML.
     *
     * @param  string  $string
     * @param  array  $options
     * @param  array  $extensions
     * @return string
     */
    public static function markdown($string, array $options = [], array $extensions = [])
    {
        $converter = new GithubFlavoredMarkdownConverter($options);

        $environment = $converter->getEnvironment();

        foreach ($extensions as $extension) {
            $environment->addExtension($extension);
        }

        return (string) $converter->convert($string);
    }

    /**
     * Converts inline Markdown into HTML.
     *
     * @param  string  $string
     * @param  array  $options
     * @param  array  $extensions
     * @return string
     */
    public static function inlineMarkdown($string, array $options = [], array $extensions = [])
    {
        $environment = new Environment($options);

        $environment->addExtension(new GithubFlavoredMarkdownExtension());
        $environment->addExtension(new InlinesOnlyExtension());

        foreach ($extensions as $extension) {
            $environment->addExtension($extension);
        }

        $converter = new MarkdownConverter($environment);

        return (string) $converter->convert($string);
    }

    /**
     * Masks a portion of a string with a repeated character.
     *
     * @param  string  $string
     * @param  string  $character
     * @param  int  $index
     * @param  int|null  $length
     * @param  string  $encoding
     * @return string
     */
    public static function mask($string, $character, $index, $length = null, $encoding = 'UTF-8')
    {
        if ($character === '') {
            return $string;
        }

        $segment = mb_substr($string, $index, $length, $encoding);

        if ($segment === '') {
            return $string;
        }

        $strlen = mb_strlen($string, $encoding);
        $startIndex = $index;

        if ($index < 0) {
            $startIndex = $index < -$strlen ? 0 : $strlen + $index;
        }

        $start = mb_substr($string, 0, $startIndex, $encoding);
        $segmentLen = mb_strlen($segment, $encoding);
        $end = mb_substr($string, $startIndex + $segmentLen);

        return $start.str_repeat(mb_substr($character, 0, 1, $encoding), $segmentLen).$end;
    }

    /**
     * Get the string matching the given pattern.
     *
     * @param  string  $pattern
     * @param  string  $subject
     * @return string
     */
    public static function match($pattern, $subject)
    {
        preg_match($pattern, $subject, $matches);

        if (! $matches) {
            return '';
        }

        return $matches[1] ?? $matches[0];
    }

    /**
     * Determine if a given string matches a given pattern.
     *
     * @param  string|iterable<string>  $pattern
     * @param  string  $value
     * @return bool
     */
    public static function isMatch($pattern, $value)
    {
        $value = (string) $value;

        if (! is_iterable($pattern)) {
            $pattern = [$pattern];
        }

        foreach ($pattern as $pattern) {
            $pattern = (string) $pattern;

            if (preg_match($pattern, $value) === 1) {
                return true;
            }
        }

        return false;
    }

    /**
     * Get the string matching the given pattern.
     *
     * @param  string  $pattern
     * @param  string  $subject
     * @return \Illuminate\Support\Collection
     */
    public static function matchAll($pattern, $subject)
    {
        preg_match_all($pattern, $subject, $matches);

        if (empty($matches[0])) {
            return new Collection;
        }

        return new Collection($matches[1] ?? $matches[0]);
    }

    /**
     * Remove all non-numeric characters from a string.
     *
     * @param  string  $value
     * @return string
     */
    public static function numbers($value)
    {
        return preg_replace('/[^0-9]/', '', $value);
    }

    /**
     * Pad both sides of a string with another.
     *
     * @param  string  $value
     * @param  int  $length
     * @param  string  $pad
     * @return string
     */
    public static function padBoth($value, $length, $pad = ' ')
    {
        if (function_exists('mb_str_pad')) {
            return mb_str_pad($value, $length, $pad, STR_PAD_BOTH);
        }

        $short = max(0, $length - mb_strlen($value));
        $shortLeft = floor($short / 2);
        $shortRight = ceil($short / 2);

        return mb_substr(str_repeat($pad, $shortLeft), 0, $shortLeft).
               $value.
               mb_substr(str_repeat($pad, $shortRight), 0, $shortRight);
    }

    /**
     * Pad the left side of a string with another.
     *
     * @param  string  $value
     * @param  int  $length
     * @param  string  $pad
     * @return string
     */
    public static function padLeft($value, $length, $pad = ' ')
    {
        if (function_exists('mb_str_pad')) {
            return mb_str_pad($value, $length, $pad, STR_PAD_LEFT);
        }

        $short = max(0, $length - mb_strlen($value));

        return mb_substr(str_repeat($pad, $short), 0, $short).$value;
    }

    /**
     * Pad the right side of a string with another.
     *
     * @param  string  $value
     * @param  int  $length
     * @param  string  $pad
     * @return string
     */
    public static function padRight($value, $length, $pad = ' ')
    {
        if (function_exists('mb_str_pad')) {
            return mb_str_pad($value, $length, $pad, STR_PAD_RIGHT);
        }

        $short = max(0, $length - mb_strlen($value));

        return $value.mb_substr(str_repeat($pad, $short), 0, $short);
    }

    /**
     * Parse a Class[@]method style callback into class and method.
     *
     * @param  string  $callback
     * @param  string|null  $default
     * @return array<int, string|null>
     */
    public static function parseCallback($callback, $default = null)
    {
        if (static::contains($callback, "@anonymous\0")) {
            if (static::substrCount($callback, '@') > 1) {
                return [
                    static::beforeLast($callback, '@'),
                    static::afterLast($callback, '@'),
                ];
            }

            return [$callback, $default];
        }

        return static::contains($callback, '@') ? explode('@', $callback, 2) : [$callback, $default];
    }

    /**
     * Get the plural form of an English word.
     *
     * @param  string  $value
     * @param  int|array|\Countable  $count
     * @return string
     */
    public static function plural($value, $count = 2)
    {
        return Pluralizer::plural($value, $count);
    }

    /**
     * Pluralize the last word of an English, studly caps case string.
     *
     * @param  string  $value
     * @param  int|array|\Countable  $count
     * @return string
     */
    public static function pluralStudly($value, $count = 2)
    {
        $parts = preg_split('/(.)(?=[A-Z])/u', $value, -1, PREG_SPLIT_DELIM_CAPTURE);

        $lastWord = array_pop($parts);

        return implode('', $parts).self::plural($lastWord, $count);
    }

    /**
     * Generate a random, secure password.
     *
     * @param  int  $length
     * @param  bool  $letters
     * @param  bool  $numbers
     * @param  bool  $symbols
     * @param  bool  $spaces
     * @return string
     */
    public static function password($length = 32, $letters = true, $numbers = true, $symbols = true, $spaces = false)
    {
        $password = new Collection();

        $options = (new Collection([
            'letters' => $letters === true ? [
                'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k',
                'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
                'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
                'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
                'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
            ] : null,
            'numbers' => $numbers === true ? [
                '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
            ] : null,
            'symbols' => $symbols === true ? [
                '~', '!', '#', '$', '%', '^', '&', '*', '(', ')', '-',
                '_', '.', ',', '<', '>', '?', '/', '\\', '{', '}', '[',
                ']', '|', ':', ';',
            ] : null,
            'spaces' => $spaces === true ? [' '] : null,
        ]))->filter()->each(fn ($c) => $password->push($c[random_int(0, count($c) - 1)])
        )->flatten();

        $length = $length - $password->count();

        return $password->merge($options->pipe(
            fn ($c) => Collection::times($length, fn () => $c[random_int(0, $c->count() - 1)])
        ))->shuffle()->implode('');
    }

    /**
     * Find the multi-byte safe position of the first occurrence of a given substring in a string.
     *
     * @param  string  $haystack
     * @param  string  $needle
     * @param  int  $offset
     * @param  string|null  $encoding
     * @return int|false
     */
    public static function position($haystack, $needle, $offset = 0, $encoding = null)
    {
        return mb_strpos($haystack, (string) $needle, $offset, $encoding);
    }

    /**
     * Generate a more truly "random" alpha-numeric string.
     *
     * @param  int  $length
     * @return string
     */
    public static function random($length = 16)
    {
        return (static::$randomStringFactory ?? function ($length) {
            $string = '';

            while (($len = strlen($string)) < $length) {
                $size = $length - $len;

                $bytesSize = (int) ceil($size / 3) * 3;

                $bytes = random_bytes($bytesSize);

                $string .= substr(str_replace(['/', '+', '='], '', base64_encode($bytes)), 0, $size);
            }

            return $string;
        })($length);
    }

    /**
     * Set the callable that will be used to generate random strings.
     *
     * @param  callable|null  $factory
     * @return void
     */
    public static function createRandomStringsUsing(?callable $factory = null)
    {
        static::$randomStringFactory = $factory;
    }

    /**
     * Set the sequence that will be used to generate random strings.
     *
     * @param  array  $sequence
     * @param  callable|null  $whenMissing
     * @return void
     */
    public static function createRandomStringsUsingSequence(array $sequence, $whenMissing = null)
    {
        $next = 0;

        $whenMissing ??= function ($length) use (&$next) {
            $factoryCache = static::$randomStringFactory;

            static::$randomStringFactory = null;

            $randomString = static::random($length);

            static::$randomStringFactory = $factoryCache;

            $next++;

            return $randomString;
        };

        static::createRandomStringsUsing(function ($length) use (&$next, $sequence, $whenMissing) {
            if (array_key_exists($next, $sequence)) {
                return $sequence[$next++];
            }

            return $whenMissing($length);
        });
    }

    /**
     * Indicate that random strings should be created normally and not using a custom factory.
     *
     * @return void
     */
    public static function createRandomStringsNormally()
    {
        static::$randomStringFactory = null;
    }

    /**
     * Repeat the given string.
     *
     * @param  string  $string
     * @param  int  $times
     * @return string
     */
    public static function repeat(string $string, int $times)
    {
        return str_repeat($string, $times);
    }

    /**
     * Replace a given value in the string sequentially with an array.
     *
     * @param  string  $search
     * @param  iterable<string>  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceArray($search, $replace, $subject)
    {
        if ($replace instanceof Traversable) {
            $replace = (new Collection($replace))->all();
        }

        $segments = explode($search, $subject);

        $result = array_shift($segments);

        foreach ($segments as $segment) {
            $result .= self::toStringOr(array_shift($replace) ?? $search, $search).$segment;
        }

        return $result;
    }

    /**
     * Convert the given value to a string or return the given fallback on failure.
     *
     * @param  mixed  $value
     * @param  string  $fallback
     * @return string
     */
    private static function toStringOr($value, $fallback)
    {
        try {
            return (string) $value;
        } catch (Throwable $e) {
            return $fallback;
        }
    }

    /**
     * Replace the given value in the given string.
     *
     * @param  string|iterable<string>  $search
     * @param  string|iterable<string>  $replace
     * @param  string|iterable<string>  $subject
     * @param  bool  $caseSensitive
     * @return string|string[]
     */
    public static function replace($search, $replace, $subject, $caseSensitive = true)
    {
        if ($search instanceof Traversable) {
            $search = (new Collection($search))->all();
        }

        if ($replace instanceof Traversable) {
            $replace = (new Collection($replace))->all();
        }

        if ($subject instanceof Traversable) {
            $subject = (new Collection($subject))->all();
        }

        return $caseSensitive
                ? str_replace($search, $replace, $subject)
                : str_ireplace($search, $replace, $subject);
    }

    /**
     * Replace the first occurrence of a given value in the string.
     *
     * @param  string  $search
     * @param  string  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceFirst($search, $replace, $subject)
    {
        $search = (string) $search;

        if ($search === '') {
            return $subject;
        }

        $position = strpos($subject, $search);

        if ($position !== false) {
            return substr_replace($subject, $replace, $position, strlen($search));
        }

        return $subject;
    }

    /**
     * Replace the first occurrence of the given value if it appears at the start of the string.
     *
     * @param  string  $search
     * @param  string  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceStart($search, $replace, $subject)
    {
        $search = (string) $search;

        if ($search === '') {
            return $subject;
        }

        if (static::startsWith($subject, $search)) {
            return static::replaceFirst($search, $replace, $subject);
        }

        return $subject;
    }

    /**
     * Replace the last occurrence of a given value in the string.
     *
     * @param  string  $search
     * @param  string  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceLast($search, $replace, $subject)
    {
        $search = (string) $search;

        if ($search === '') {
            return $subject;
        }

        $position = strrpos($subject, $search);

        if ($position !== false) {
            return substr_replace($subject, $replace, $position, strlen($search));
        }

        return $subject;
    }

    /**
     * Replace the last occurrence of a given value if it appears at the end of the string.
     *
     * @param  string  $search
     * @param  string  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceEnd($search, $replace, $subject)
    {
        $search = (string) $search;

        if ($search === '') {
            return $subject;
        }

        if (static::endsWith($subject, $search)) {
            return static::replaceLast($search, $replace, $subject);
        }

        return $subject;
    }

    /**
     * Replace the patterns matching the given regular expression.
     *
     * @param  array|string  $pattern
     * @param  \Closure|string[]|string  $replace
     * @param  array|string  $subject
     * @param  int  $limit
     * @return string|string[]|null
     */
    public static function replaceMatches($pattern, $replace, $subject, $limit = -1)
    {
        if ($replace instanceof Closure) {
            return preg_replace_callback($pattern, $replace, $subject, $limit);
        }

        return preg_replace($pattern, $replace, $subject, $limit);
    }

    /**
     * Remove any occurrence of the given string in the subject.
     *
     * @param  string|iterable<string>  $search
     * @param  string|iterable<string>  $subject
     * @param  bool  $caseSensitive
     * @return string
     */
    public static function remove($search, $subject, $caseSensitive = true)
    {
        if ($search instanceof Traversable) {
            $search = (new Collection($search))->all();
        }

        return $caseSensitive
                    ? str_replace($search, '', $subject)
                    : str_ireplace($search, '', $subject);
    }

    /**
     * Reverse the given string.
     *
     * @param  string  $value
     * @return string
     */
    public static function reverse(string $value)
    {
        return implode(array_reverse(mb_str_split($value)));
    }

    /**
     * Begin a string with a single instance of a given value.
     *
     * @param  string  $value
     * @param  string  $prefix
     * @return string
     */
    public static function start($value, $prefix)
    {
        $quoted = preg_quote($prefix, '/');

        return $prefix.preg_replace('/^(?:'.$quoted.')+/u', '', $value);
    }

    /**
     * Convert the given string to upper-case.
     *
     * @param  string  $value
     * @return string
     */
    public static function upper($value)
    {
        return mb_strtoupper($value, 'UTF-8');
    }

    /**
     * Convert the given string to proper case.
     *
     * @param  string  $value
     * @return string
     */
    public static function title($value)
    {
        return mb_convert_case($value, MB_CASE_TITLE, 'UTF-8');
    }

    /**
     * Convert the given string to proper case for each word.
     *
     * @param  string  $value
     * @return string
     */
    public static function headline($value)
    {
        $parts = explode(' ', $value);

        $parts = count($parts) > 1
            ? array_map([static::class, 'title'], $parts)
            : array_map([static::class, 'title'], static::ucsplit(implode('_', $parts)));

        $collapsed = static::replace(['-', '_', ' '], '_', implode('_', $parts));

        return implode(' ', array_filter(explode('_', $collapsed)));
    }

    /**
     * Convert the given string to APA-style title case.
     *
     * See: https://apastyle.apa.org/style-grammar-guidelines/capitalization/title-case
     *
     * @param  string  $value
     * @return string
     */
    public static function apa($value)
    {
        if (trim($value) === '') {
            return $value;
        }

        $minorWords = [
            'and', 'as', 'but', 'for', 'if', 'nor', 'or', 'so', 'yet', 'a', 'an',
            'the', 'at', 'by', 'for', 'in', 'of', 'off', 'on', 'per', 'to', 'up', 'via',
            'et', 'ou', 'un', 'une', 'la', 'le', 'les', 'de', 'du', 'des', 'par', 'à',
        ];

        $endPunctuation = ['.', '!', '?', ':', '—', ','];

        $words = preg_split('/\s+/', $value, -1, PREG_SPLIT_NO_EMPTY);

        for ($i = 0; $i < count($words); $i++) {
            $lowercaseWord = mb_strtolower($words[$i]);

            if (str_contains($lowercaseWord, '-')) {
                $hyphenatedWords = explode('-', $lowercaseWord);

                $hyphenatedWords = array_map(function ($part) use ($minorWords) {
                    return (in_array($part, $minorWords) && mb_strlen($part) <= 3)
                        ? $part
                        : mb_strtoupper(mb_substr($part, 0, 1)).mb_substr($part, 1);
                }, $hyphenatedWords);

                $words[$i] = implode('-', $hyphenatedWords);
            } else {
                if (in_array($lowercaseWord, $minorWords) &&
                    mb_strlen($lowercaseWord) <= 3 &&
                    ! ($i === 0 || in_array(mb_substr($words[$i - 1], -1), $endPunctuation))) {
                    $words[$i] = $lowercaseWord;
                } else {
                    $words[$i] = mb_strtoupper(mb_substr($lowercaseWord, 0, 1)).mb_substr($lowercaseWord, 1);
                }
            }
        }

        return implode(' ', $words);
    }

    /**
     * Get the singular form of an English word.
     *
     * @param  string  $value
     * @return string
     */
    public static function singular($value)
    {
        return Pluralizer::singular($value);
    }

    /**
     * Generate a URL friendly "slug" from a given string.
     *
     * @param  string  $title
     * @param  string  $separator
     * @param  string|null  $language
     * @param  array<string, string>  $dictionary
     * @return string
     */
    public static function slug($title, $separator = '-', $language = 'en', $dictionary = ['@' => 'at'])
    {
        $title = $language ? static::ascii($title, $language) : $title;

        // Convert all dashes/underscores into separator
        $flip = $separator === '-' ? '_' : '-';

        $title = preg_replace('!['.preg_quote($flip).']+!u', $separator, $title);

        // Replace dictionary words
        foreach ($dictionary as $key => $value) {
            $dictionary[$key] = $separator.$value.$separator;
        }

        $title = str_replace(array_keys($dictionary), array_values($dictionary), $title);

        // Remove all characters that are not the separator, letters, numbers, or whitespace
        $title = preg_replace('![^'.preg_quote($separator).'\pL\pN\s]+!u', '', static::lower($title));

        // Replace all separator characters and whitespace by a single separator
        $title = preg_replace('!['.preg_quote($separator).'\s]+!u', $separator, $title);

        return trim($title, $separator);
    }

    /**
     * Convert a string to snake case.
     *
     * @param  string  $value
     * @param  string  $delimiter
     * @return string
     */
    public static function snake($value, $delimiter = '_')
    {
        $key = $value;

        if (isset(static::$snakeCache[$key][$delimiter])) {
            return static::$snakeCache[$key][$delimiter];
        }

        if (! ctype_lower($value)) {
            $value = preg_replace('/\s+/u', '', ucwords($value));

            $value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1'.$delimiter, $value));
        }

        return static::$snakeCache[$key][$delimiter] = $value;
    }

    /**
     * Remove all whitespace from both ends of a string.
     *
     * @param  string  $value
     * @param  string|null  $charlist
     * @return string
     */
    public static function trim($value, $charlist = null)
    {
        if ($charlist === null) {
            $trimDefaultCharacters = " \n\r\t\v\0";

            return preg_replace('~^[\s\x{FEFF}\x{200B}\x{200E}'.$trimDefaultCharacters.']+|[\s\x{FEFF}\x{200B}\x{200E}'.$trimDefaultCharacters.']+$~u', '', $value) ?? trim($value);
        }

        return trim($value, $charlist);
    }

    /**
     * Remove all whitespace from the beginning of a string.
     *
     * @param  string  $value
     * @param  string|null  $charlist
     * @return string
     */
    public static function ltrim($value, $charlist = null)
    {
        if ($charlist === null) {
            $ltrimDefaultCharacters = " \n\r\t\v\0";

            return preg_replace('~^[\s\x{FEFF}\x{200B}\x{200E}'.$ltrimDefaultCharacters.']+~u', '', $value) ?? ltrim($value);
        }

        return ltrim($value, $charlist);
    }

    /**
     * Remove all whitespace from the end of a string.
     *
     * @param  string  $value
     * @param  string|null  $charlist
     * @return string
     */
    public static function rtrim($value, $charlist = null)
    {
        if ($charlist === null) {
            $rtrimDefaultCharacters = " \n\r\t\v\0";

            return preg_replace('~[\s\x{FEFF}\x{200B}\x{200E}'.$rtrimDefaultCharacters.']+$~u', '', $value) ?? rtrim($value);
        }

        return rtrim($value, $charlist);
    }

    /**
     * Remove all "extra" blank space from the given string.
     *
     * @param  string  $value
     * @return string
     */
    public static function squish($value)
    {
        return preg_replace('~(\s|\x{3164}|\x{1160})+~u', ' ', static::trim($value));
    }

    /**
     * Determine if a given string starts with a given substring.
     *
     * @param  string  $haystack
     * @param  string|iterable<string>  $needles
     * @return bool
     */
    public static function startsWith($haystack, $needles)
    {
        if (! is_iterable($needles)) {
            $needles = [$needles];
        }

        foreach ($needles as $needle) {
            if ((string) $needle !== '' && str_starts_with($haystack, $needle)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Convert a value to studly caps case.
     *
     * @param  string  $value
     * @return string
     */
    public static function studly($value)
    {
        $key = $value;

        if (isset(static::$studlyCache[$key])) {
            return static::$studlyCache[$key];
        }

        $words = explode(' ', static::replace(['-', '_'], ' ', $value));

        $studlyWords = array_map(fn ($word) => static::ucfirst($word), $words);

        return static::$studlyCache[$key] = implode($studlyWords);
    }

    /**
     * Returns the portion of the string specified by the start and length parameters.
     *
     * @param  string  $string
     * @param  int  $start
     * @param  int|null  $length
     * @param  string  $encoding
     * @return string
     */
    public static function substr($string, $start, $length = null, $encoding = 'UTF-8')
    {
        return mb_substr($string, $start, $length, $encoding);
    }

    /**
     * Returns the number of substring occurrences.
     *
     * @param  string  $haystack
     * @param  string  $needle
     * @param  int  $offset
     * @param  int|null  $length
     * @return int
     */
    public static function substrCount($haystack, $needle, $offset = 0, $length = null)
    {
        if (! is_null($length)) {
            return substr_count($haystack, $needle, $offset, $length);
        }

        return substr_count($haystack, $needle, $offset);
    }

    /**
     * Replace text within a portion of a string.
     *
     * @param  string|string[]  $string
     * @param  string|string[]  $replace
     * @param  int|int[]  $offset
     * @param  int|int[]|null  $length
     * @return string|string[]
     */
    public static function substrReplace($string, $replace, $offset = 0, $length = null)
    {
        if ($length === null) {
            $length = strlen($string);
        }

        return substr_replace($string, $replace, $offset, $length);
    }

    /**
     * Swap multiple keywords in a string with other keywords.
     *
     * @param  array  $map
     * @param  string  $subject
     * @return string
     */
    public static function swap(array $map, $subject)
    {
        return strtr($subject, $map);
    }

    /**
     * Take the first or last {$limit} characters of a string.
     *
     * @param  string  $string
     * @param  int  $limit
     * @return string
     */
    public static function take($string, int $limit): string
    {
        if ($limit < 0) {
            return static::substr($string, $limit);
        }

        return static::substr($string, 0, $limit);
    }

    /**
     * Convert the given string to Base64 encoding.
     *
     * @param  string  $string
     * @return string
     */
    public static function toBase64($string): string
    {
        return base64_encode($string);
    }

    /**
     * Decode the given Base64 encoded string.
     *
     * @param  string  $string
     * @param  bool  $strict
     * @return string|false
     */
    public static function fromBase64($string, $strict = false)
    {
        return base64_decode($string, $strict);
    }

    /**
     * Make a string's first character lowercase.
     *
     * @param  string  $string
     * @return string
     */
    public static function lcfirst($string)
    {
        return static::lower(static::substr($string, 0, 1)).static::substr($string, 1);
    }

    /**
     * Make a string's first character uppercase.
     *
     * @param  string  $string
     * @return string
     */
    public static function ucfirst($string)
    {
        return static::upper(static::substr($string, 0, 1)).static::substr($string, 1);
    }

    /**
     * Split a string into pieces by uppercase characters.
     *
     * @param  string  $string
     * @return string[]
     */
    public static function ucsplit($string)
    {
        return preg_split('/(?=\p{Lu})/u', $string, -1, PREG_SPLIT_NO_EMPTY);
    }

    /**
     * Get the number of words a string contains.
     *
     * @param  string  $string
     * @param  string|null  $characters
     * @return int
     */
    public static function wordCount($string, $characters = null)
    {
        return str_word_count($string, 0, $characters);
    }

    /**
     * Wrap a string to a given number of characters.
     *
     * @param  string  $string
     * @param  int  $characters
     * @param  string  $break
     * @param  bool  $cutLongWords
     * @return string
     */
    public static function wordWrap($string, $characters = 75, $break = "\n", $cutLongWords = false)
    {
        return wordwrap($string, $characters, $break, $cutLongWords);
    }

    /**
     * Generate a UUID (version 4).
     *
     * @return \Ramsey\Uuid\UuidInterface
     */
    public static function uuid()
    {
        return static::$uuidFactory
                    ? call_user_func(static::$uuidFactory)
                    : Uuid::uuid4();
    }

    /**
     * Generate a UUID (version 7).
     *
     * @param  \DateTimeInterface|null  $time
     * @return \Ramsey\Uuid\UuidInterface
     */
    public static function uuid7($time = null)
    {
        return static::$uuidFactory
                    ? call_user_func(static::$uuidFactory)
                    : Uuid::uuid7($time);
    }

    /**
     * Generate a time-ordered UUID.
     *
     * @return \Ramsey\Uuid\UuidInterface
     */
    public static function orderedUuid()
    {
        if (static::$uuidFactory) {
            return call_user_func(static::$uuidFactory);
        }

        $factory = new UuidFactory;

        $factory->setRandomGenerator(new CombGenerator(
            $factory->getRandomGenerator(),
            $factory->getNumberConverter()
        ));

        $factory->setCodec(new TimestampFirstCombCodec(
            $factory->getUuidBuilder()
        ));

        return $factory->uuid4();
    }

    /**
     * Set the callable that will be used to generate UUIDs.
     *
     * @param  callable|null  $factory
     * @return void
     */
    public static function createUuidsUsing(?callable $factory = null)
    {
        static::$uuidFactory = $factory;
    }

    /**
     * Set the sequence that will be used to generate UUIDs.
     *
     * @param  array  $sequence
     * @param  callable|null  $whenMissing
     * @return void
     */
    public static function createUuidsUsingSequence(array $sequence, $whenMissing = null)
    {
        $next = 0;

        $whenMissing ??= function () use (&$next) {
            $factoryCache = static::$uuidFactory;

            static::$uuidFactory = null;

            $uuid = static::uuid();

            static::$uuidFactory = $factoryCache;

            $next++;

            return $uuid;
        };

        static::createUuidsUsing(function () use (&$next, $sequence, $whenMissing) {
            if (array_key_exists($next, $sequence)) {
                return $sequence[$next++];
            }

            return $whenMissing();
        });
    }

    /**
     * Always return the same UUID when generating new UUIDs.
     *
     * @param  \Closure|null  $callback
     * @return \Ramsey\Uuid\UuidInterface
     */
    public static function freezeUuids(?Closure $callback = null)
    {
        $uuid = Str::uuid();

        Str::createUuidsUsing(fn () => $uuid);

        if ($callback !== null) {
            try {
                $callback($uuid);
            } finally {
                Str::createUuidsNormally();
            }
        }

        return $uuid;
    }

    /**
     * Indicate that UUIDs should be created normally and not using a custom factory.
     *
     * @return void
     */
    public static function createUuidsNormally()
    {
        static::$uuidFactory = null;
    }

    /**
     * Generate a ULID.
     *
     * @param  \DateTimeInterface|null  $time
     * @return \Symfony\Component\Uid\Ulid
     */
    public static function ulid($time = null)
    {
        if (static::$ulidFactory) {
            return call_user_func(static::$ulidFactory);
        }

        if ($time === null) {
            return new Ulid();
        }

        return new Ulid(Ulid::generate($time));
    }

    /**
     * Indicate that ULIDs should be created normally and not using a custom factory.
     *
     * @return void
     */
    public static function createUlidsNormally()
    {
        static::$ulidFactory = null;
    }

    /**
     * Set the callable that will be used to generate ULIDs.
     *
     * @param  callable|null  $factory
     * @return void
     */
    public static function createUlidsUsing(?callable $factory = null)
    {
        static::$ulidFactory = $factory;
    }

    /**
     * Set the sequence that will be used to generate ULIDs.
     *
     * @param  array  $sequence
     * @param  callable|null  $whenMissing
     * @return void
     */
    public static function createUlidsUsingSequence(array $sequence, $whenMissing = null)
    {
        $next = 0;

        $whenMissing ??= function () use (&$next) {
            $factoryCache = static::$ulidFactory;

            static::$ulidFactory = null;

            $ulid = static::ulid();

            static::$ulidFactory = $factoryCache;

            $next++;

            return $ulid;
        };

        static::createUlidsUsing(function () use (&$next, $sequence, $whenMissing) {
            if (array_key_exists($next, $sequence)) {
                return $sequence[$next++];
            }

            return $whenMissing();
        });
    }

    /**
     * Always return the same ULID when generating new ULIDs.
     *
     * @param  Closure|null  $callback
     * @return Ulid
     */
    public static function freezeUlids(?Closure $callback = null)
    {
        $ulid = Str::ulid();

        Str::createUlidsUsing(fn () => $ulid);

        if ($callback !== null) {
            try {
                $callback($ulid);
            } finally {
                Str::createUlidsNormally();
            }
        }

        return $ulid;
    }

    /**
     * Remove all strings from the casing caches.
     *
     * @return void
     */
    public static function flushCache()
    {
        static::$snakeCache = [];
        static::$camelCache = [];
        static::$studlyCache = [];
    }
}