3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = function($var1, $var2) { var_dump($var1, $var2); } call_user_func('foo', ['bar', 'baz']);
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.29, 5.6.8 - 5.6.13
Parse error: syntax error, unexpected 'call_user_func' (T_STRING) in /in/IdYu9 on line 7
Process exited with code 255.

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