Added method generate random text

CHANGELOG.md

@@ -33,6 +33,7 @@
 - Removed `__construct` from `Phalcon\Mvc\View\EngineInterface`
 - Added `Phalcon\Debug\Dump::toJson()` to return an JSON string of information about a single variable
 - Now instances in Phalcon\Di are built using internal optimizers instead of ReflectionClass (PHP 5.6)
+- Added method `Text:dynamic()` generate random text in accordance with the template
 
 # [2.0.3](https://github.com/phalcon/cphalcon/releases/tag/phalcon-v2.0.3) (2015-06-10)
 - Added support for Behaviors in `Phalcon\Mvc\Collection`

phalcon/text.zep

@@ -247,4 +247,36 @@ abstract class Text
 
 		return rtrim(a, separator) . separator . ltrim(b, separator);
 	}
+
+	/**
+	 * Generates random text in accordance with the template
+	 *
+	 * <code>
+	 *    echo Phalcon\Text::dynamic("{Hi|Hello}, my name is a {Bob|Mark|Jon}!"); // Hi my name is a Bob
+	 *    echo Phalcon\Text::dynamic("{Hi|Hello}, my name is a {Bob|Mark|Jon}!"); // Hi my name is a Jon
+	 *    echo Phalcon\Text::dynamic("{Hi|Hello}, my name is a {Bob|Mark|Jon}!"); // Hello my name is a Bob
+	 * </code>
+	 */
+	public static function dynamic(string! text, string! leftDelimiter = "{", string! rightDelimiter = "}", string! separator = "|") -> string
+	{
+		if substr_count(text, leftDelimiter) !== substr_count(text, rightDelimiter) {
+			throw new \RuntimeException("Syntax error in string \"" . text . "\"");
+		}
+
+		var ld_s, rd_s, result, pattern, words;
+
+		let ld_s 	= preg_quote(leftDelimiter);
+		let rd_s 	= preg_quote(rightDelimiter);
+		let pattern = "/" . ld_s . "([^" . ld_s . rd_s . "]+)" . rd_s . "/";
+		let result 	= text;
+
+		while strpos(result, leftDelimiter) !== false {
+			let result = preg_replace_callback(pattern, function (matches) {
+				let words = explode(separator, matches[1]);
+				return words[array_rand(words)];
+			}, result);
+		}
+
+		return result;
+	}
 }