3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array("a","b","c"); $counter = 0; $status = array(); foreach($arr as $a){ $status[$counter] += 10; $status[$counter] += 20; $status[$counter] += 20; echo $status[$counter]."<br>"; $counter ++; }
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 array key 0 in /in/p8ScI on line 6 50<br> Warning: Undefined array key 1 in /in/p8ScI on line 6 50<br> Warning: Undefined array key 2 in /in/p8ScI on line 6 50<br>
Output for 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 - 7.4.33
Notice: Undefined offset: 0 in /in/p8ScI on line 6 50<br> Notice: Undefined offset: 1 in /in/p8ScI on line 6 50<br> Notice: Undefined offset: 2 in /in/p8ScI on line 6 50<br>
Output for 7.3.32 - 7.3.33
50<br>50<br>50<br>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined offset: 0 in /in/p8ScI on line 6 50<br> Notice: Undefined offset: 1 in /in/p8ScI on line 6 50<br> Notice: Undefined offset: 2 in /in/p8ScI on line 6 50<br>

preferences:
271.49 ms | 402 KiB | 460 Q