3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $f = function(){}; var_export(function_exists($f));
based on CWUNN
Output for 5.3.0 - 7.1.0
Warning: function_exists() expects parameter 1 to be string, object given in /in/I8rFr on line 3 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/I8rFr on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/I8rFr on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/I8rFr on line 2
Process exited with code 255.