3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strpos(log(($int^pow(2,ceil(log($int, 2)))-1)+1,2),'.');
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $int in /in/1IE3i on line 2 Deprecated: log(): Passing null to parameter #1 ($num) of type float is deprecated in /in/1IE3i on line 2 Warning: Undefined variable $int in /in/1IE3i on line 2
Output for 8.0.0 - 8.0.30
Warning: Undefined variable $int in /in/1IE3i on line 2 Warning: Undefined variable $int in /in/1IE3i on line 2
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: int in /in/1IE3i on line 2 Notice: Undefined variable: int in /in/1IE3i on line 2
Output for 7.3.32 - 7.3.33, 7.4.26
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: int in /in/1IE3i on line 2 Notice: Undefined variable: int in /in/1IE3i on line 2
preferences:
279.33 ms | 402 KiB | 460 Q