refactor code

README.md

@@ -3,9 +3,11 @@
 ![Platfrom icon](https://img.shields.io/badge/Platform-Windows%2C%20Linux%2C%20Mac-blue)
 [![Codacy Badge](https://app.codacy.com/project/badge/Coverage/328e8eae9a494098b8a8ee66d602f781)](https://app.codacy.com/gh/rvalitov/backlink-checker-php/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_coverage)
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+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=rvalitov_backlink-checker-php&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=rvalitov_backlink-checker-php)
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+[![Bugs](https://sonarcloud.io/api/project_badges/measure?project=rvalitov_backlink-checker-php&metric=bugs)](https://sonarcloud.io/summary/new_code?id=rvalitov_backlink-checker-php)
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@@ -201,9 +203,7 @@ Tests are in `tests` folder.
 
 # System Requirements
 
-We use dependencies, therefore we need PHP 7.4 and later.
-PHP 8.0 supported. PHP 8.1 not supported.
-Required PHP extensions:
+PHP 7.4+ required with the following extensions:
 
 *   [`json`](https://www.php.net/manual/en/json.installation.php)
 *   [`sockets`](https://www.php.net/manual/en/sockets.installation.php)

composer.json

@@ -4,6 +4,9 @@
   "homepage": "https://github.com/rvalitov/backlink-checker-php",
   "license": "GPL-3.0-or-later",
   "scripts": {
+    "phpcbf": "phpcbf --standard=PSR2 src/",
+    "phpcs": "phpcs --standard=PSR2 src/",
+    "phpmd": "phpmd src/ text phpmd.xml",
     "test": "phpunit --coverage-clover ./coverage/clover.xml --coverage-html ./coverage/html --coverage-xml ./coverage/xml --coverage-text"
   },
   "authors": [
@@ -39,6 +42,8 @@
   },
   "require-dev": {
     "ext-xdebug": "^3.1.0",
+    "phpmd/phpmd": "@stable",
+    "squizlabs/php_codesniffer": "3.*",
     "phpunit/phpunit": "^9",
     "phpunit/php-code-coverage": "^9"
   },