3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = Array ( 'id' => 2, 'user' => 4, ); /** * Search for the index of a value in an array. * * @param array $array * @param string $value * * @return mixed */ function search($array, $value) { return array_search($value, $array, true); } echo search($array,2);
Output for 7.1.25 - 7.1.32, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
id

preferences:
140.8 ms | 407 KiB | 5 Q