3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($f = 0; $f < 10; $f++) { echo $f; if($f == 4) $f = 8; } $f = array(1,2,3,4,5,6,7,8,9,10); foreach($f as $k => $v) { echo $k; if($k == 4) $k = 8; }
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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
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preferences:
239.81 ms | 405 KiB | 382 Q