3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace foo; $foo = function (&$arg) { var_dump($arg); }; $a = 'bar'; $b =& $a; $x = "call_user_func_array" $x($foo, [$b]); \call_user_func_array($foo, [$b]);
Output for 5.4.0 - 5.4.44, 5.5.24 - 5.5.28, 5.6.8 - 5.6.12
Parse error: syntax error, unexpected '$x' (T_VARIABLE) in /in/eN3Ml on line 13
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_VARIABLE in /in/eN3Ml on line 13
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_STRING in /in/eN3Ml 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_STRING in /in/eN3Ml on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/eN3Ml on line 3
Process exited with code 255.
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218.63 ms | 1395 KiB | 144 Q