3v4l.org

run code in 300+ PHP versions simultaneously
<?php $haystack = [ "a" => 2, "b" => 4, "c" => 2, "d" => 5, "e" => 6, "f" => 2 ]; $needle = 2; var_export( array_filter( $haystack, fn($v) => $v === $needle ) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 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 ( 'a' => 2, 'c' => 2, 'f' => 2, )
preferences:
95.44 ms | 1248 KiB | 4 Q