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<?php $before = [ ['type' => 'foo'], ['type' => 'only-first-of-this'], ['type' => 'bar'], ['type' => 'only-first-of-this'], ['type' => 'baz'], ]; $found = 0; $after = array_filter( $before, static fn ($item) => $item['type'] !== 'only-first-of-this' || $found++ === 0, ); var_dump($before, $after); $found = 0; $after2 = array_filter( $before, static function ($item) use (&$found) { return $item['type'] !== 'only-first-of-this' || $found++ === 0; }, ); var_dump($after2);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.16, 8.4.1 - 8.4.3
array(5) { [0]=> array(1) { ["type"]=> string(3) "foo" } [1]=> array(1) { ["type"]=> string(18) "only-first-of-this" } [2]=> array(1) { ["type"]=> string(3) "bar" } [3]=> array(1) { ["type"]=> string(18) "only-first-of-this" } [4]=> array(1) { ["type"]=> string(3) "baz" } } array(5) { [0]=> array(1) { ["type"]=> string(3) "foo" } [1]=> array(1) { ["type"]=> string(18) "only-first-of-this" } [2]=> array(1) { ["type"]=> string(3) "bar" } [3]=> array(1) { ["type"]=> string(18) "only-first-of-this" } [4]=> array(1) { ["type"]=> string(3) "baz" } } array(4) { [0]=> array(1) { ["type"]=> string(3) "foo" } [1]=> array(1) { ["type"]=> string(18) "only-first-of-this" } [2]=> array(1) { ["type"]=> string(3) "bar" } [4]=> array(1) { ["type"]=> string(3) "baz" } }
Output for 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 - 7.2.34, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected 'fn' (T_STRING), expecting :: (T_PAAMAYIM_NEKUDOTAYIM) in /in/8Z98j on line 14
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/8Z98j on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/8Z98j on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/8Z98j on line 3
Process exited with code 255.

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