3v4l.org

run code in 300+ PHP versions simultaneously
<?php $c = array(); // You store some data using some string keys foreach (array('ab', 'cd', "10", 'gh', '24') as $key) { $c[(string)"$key"] = 1; } // You pass the array $c to some place else and there you do something like foreach ($c as $k => $v) { if ($k === "10") { echo "found"; exit; } }
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 - 5.5.38, 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 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
preferences:
347.04 ms | 406 KiB | 459 Q