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run code in 300+ PHP versions simultaneously
<?php $array = [ 'index' => 'value', 'mutex' => 'foo', 'dexter' => 'morgan' ]; $matches = array_filter($array, function ($key) { return false !== strpos($key, 'dex'); }, ARRAY_FILTER_USE_KEY); var_dump($matches);
Output for 7.0.0 - 7.0.25, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { ["index"]=> string(5) "value" ["dexter"]=> string(6) "morgan" }
preferences:
130.49 ms | 1685 KiB | 4 Q