3v4l.org

run code in 300+ PHP versions simultaneously
<?php $messages = array(312, 401, 401, 1599, 3); $del_val = 401; if(($key = array_search($del_val, $messages)) !== false) { unset($messages[$key]); } print_r($messages);
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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 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
Array ( [0] => 312 [2] => 401 [3] => 1599 [4] => 3 )

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212.7 ms | 405 KiB | 307 Q