3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f(int $a, int $b = null, int $c = null) { error_log(json_encode([$a, $b, $c])); error_log(json_encode(func_get_args())); } function changeF($code, $str) { preg_match('/^Argument (\\d+) /', $str, $m); $i = $m[1]-1; $bt = debug_backtrace(null, 2); if (count($bt[1]['args']) > $i+1) { ++$bt[1]['args'][$i+1]; } return true; } set_error_handler('changeF', E_ALL); f(3, 2, 1);
based on IdepK
Output for hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
[3,2,1] [3,2,1]
Output for 5.4.0 - 5.6.24
[3,3,2] [3,3,2]
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/JgBuh on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/JgBuh on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/JgBuh on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/JgBuh on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/JgBuh on line 3
Process exited with code 255.