3v4l.org

run code in 300+ PHP versions simultaneously
<?PHP function Log($base, $arg) { if($base==1||$base<=0) { return null; } if($arg<=0) { return null; } return log($arg)/log($base); } ?>
Output for 5.3.0 - 5.3.23, 5.4.0 - 5.4.13
Fatal error: Cannot redeclare Log() in /in/7hgkT on line 13
Process exited with code 255.

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173.18 ms | 1395 KiB | 45 Q