3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Singleton { private static $instance; private function __construct() { echo 'NEW!'; } public static function getInstance() { if (null !== self::$instance) { self::$instance = new self; } return self::$instance; } } $cl = function() { return new self; } var_dump(Singleton::getInstance());
Output for 5.4.0 - 5.4.29
Parse error: syntax error, unexpected 'var_dump' (T_STRING) in /in/92VRL on line 24
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_STRING in /in/92VRL on line 24
Process exited with code 255.

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