3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types = 1) function reduce(int $a, int $b, callable $reducer) : int { return $reducer($a, $b); } reduce(1, 2, function($a, $b, $c) { return $a + $b + 'c'; });
Output for 5.4.0 - 5.4.44, 5.5.24 - 5.5.28, 5.6.7 - 5.6.12
Warning: Unsupported declare 'strict_types' in /in/EMsH9 on line 1 Parse error: syntax error, unexpected 'reduce' (T_STRING), expecting '(' in /in/EMsH9 on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Warning: Unsupported declare 'strict_types' in /in/EMsH9 on line 1 Parse error: syntax error, unexpected T_STRING, expecting '(' in /in/EMsH9 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/EMsH9 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/EMsH9 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/EMsH9 on line 3
Process exited with code 255.

preferences:
229.9 ms | 1395 KiB | 145 Q