3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f=function($a)use(&$f){ if($a==0){ return $f(1); } return 'a'; } var_dump($f(0));
Output for 5.4.0 - 5.4.40, 5.5.24, 5.6.8
Parse error: syntax error, unexpected 'var_dump' (T_STRING) in /in/OWqs1 on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/OWqs1 on line 9
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/OWqs1 on line 2
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/OWqs1 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/OWqs1 on line 2
Process exited with code 255.
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216.76 ms | 1395 KiB | 132 Q