3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('func')) function func() { return 'something'; }
Output for 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0
Parse error: syntax error, unexpected 'func' (T_STRING), expecting '(' in /in/rQ81Q on line 3
Process exited with code 255.
preferences:
166.23 ms | 1008 KiB | 7 Q