Made two of the regular expressions compatible with PHP 5.5+ because the /e modifier being deprecated.

Author: benjamin

src/Frozennode/XssInput/Security.php

@@ -422,8 +422,8 @@ protected static function entity_decode($str, $charset='UTF-8')
 			return $str;
 		}
 		$str = html_entity_decode($str, ENT_COMPAT, $charset);
-		$str = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str);
-		return preg_replace('~&#([0-9]{2,4})~e', 'chr(\\1)', $str);
+		$str = preg_replace_callback('~&#x(0*[0-9a-f]{2,5})~i', create_function('$matches', 'return chr(hexdec($matches[1]));'), $str);
+		return preg_replace_callback('~&#([0-9]{2,4})~', create_function('$matches', 'return chr($matches[1]);'), $str);
 	}//entity_decode
 	/**
 	 * Filter Attributes