<?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.
preferences:
85.81 ms | 411 KiB | 5 Q