3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(callable $bar = null) { } foo(null); foo(function() {}); foo('strpos'); foo('foo'); foo(array(new SplFixedArray(), 'fromArray')); foo(array('SplFixedArray', 'fromArray')); foo('SplFixedArray::fromArray');
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.14
Output for 5.3.0 - 5.3.29
Catchable fatal error: Argument 1 passed to foo() must be an instance of callable, instance of Closure given, called in /in/UIjFM on line 8 and defined in /in/UIjFM on line 3
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/UIjFM on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/UIjFM on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/UIjFM 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
Parse error: parse error, unexpected T_STRING, expecting ')' in /in/UIjFM on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/UIjFM on line 3
Process exited with code 255.
preferences:
83.77 ms | 414 KiB | 5 Q