3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$link = mysql_connect('localhost', 'root', '') or die('ERROR: ' . mysql_error()); //$sel = mysql_select_db(DB_NAME, $link) or die('ERROR: ' . mysql_error()); echo 'Hello World'; echo mysql_real_escape_string(trim($_SERVER['HTTP_USER_AGENT'])); echo 'Hello World'; ?>

preferences:
37.56 ms | 402 KiB | 5 Q