3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (isset($_GET['v'])) { $var=$_GET['v']; if (preg_match('/[^A-Z]/', $var) { echo "fail"; } else { echo "success"; } }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/noKP8 on line 7
Process exited with code 255.
preferences:
172.16 ms | 1395 KiB | 36 Q