Online PHP editor | output for ZZg6s

<?php $a = "define('DB_PASSWORD', 'fuuu'); fuuu"; $b = 'define("DB_PASSWORD", "fuuu"); fuuu"; $c = 'DEFINE("DB_PASSWORD", "fuuu"); fuuu"; $d = "DEFINE('DB_PASSWORD', 'fuuu'); fuuu"; echo preg_replace('/define\([\'\"]db_password[\'\"],\s*[\'\"]123456[\'\"]/', 'define("DB_PASSWORD", "123456")', $a) . "\n"; echo preg_replace('/define\([\'\"]db_password[\'\"],\s*[\'\"]123456[\'\"]/', 'define("DB_PASSWORD", "123456")', $b) . "\n"; echo preg_replace('/define\([\'\"]db_password[\'\"],\s*[\'\"]123456[\'\"]/', 'define("DB_PASSWORD", "123456")', $c) . "\n"; echo preg_replace('/define\([\'\"]db_password[\'\"],\s*[\'\"]123456[\'\"]/', 'define("DB_PASSWORD", "123456")', $d) . "\n";