3v4l.org

run code in 300+ PHP versions simultaneously
<?php function fn ($a) { $b = $c = 1; $c += $a; return $b; } echo fn(10); // returns?
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Parse error: syntax error, unexpected token "fn", expecting "(" in /in/BJ5Qe on line 3
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected 'fn' (T_FN), expecting '(' in /in/BJ5Qe on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
1
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/BJ5Qe on line 10
Process exited with code 255.

preferences:
242.93 ms | 401 KiB | 360 Q