3v4l.org

run code in 300+ PHP versions simultaneously
<?php function ad($a=''){} if(is_int($a)){ echo $a.' >> int<br>'; }else{ echo $a.' >> not<br>'; } ad(); ad(2); ad('2'); ad(2.5); ad(0); ad(1);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $a in /in/fXrse on line 3 Warning: Undefined variable $a in /in/fXrse on line 6 >> not<br>
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: a in /in/fXrse on line 3 Notice: Undefined variable: a in /in/fXrse on line 6 >> not<br>
Output for 7.3.32 - 7.3.33, 7.4.26
>> not<br>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: a in /in/fXrse on line 3 Notice: Undefined variable: a in /in/fXrse on line 6 >> not<br>
preferences:
285.15 ms | 402 KiB | 460 Q