<?php
$arr = [
'foo',
'foo',
'bar',
'baz',
'baz'
];
array_walk($arr, function (&$item, $k) use ($arr) {
$lower = mb_strtolower($item, 'utf-8');
foreach ($arr as $i => $v) {
var_dump($k .'='. $i);
if ($i !== $k && $v !== null && $lower === mb_strtolower($v, 'utf-8')) {
var_dump('rm');
$item = null;
}
}
});
var_dump($arr);
- Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
- string(3) "0=0"
string(3) "0=1"
string(2) "rm"
string(3) "0=2"
string(3) "0=3"
string(3) "0=4"
string(3) "1=0"
string(2) "rm"
string(3) "1=1"
string(3) "1=2"
string(3) "1=3"
string(3) "1=4"
string(3) "2=0"
string(3) "2=1"
string(3) "2=2"
string(3) "2=3"
string(3) "2=4"
string(3) "3=0"
string(3) "3=1"
string(3) "3=2"
string(3) "3=3"
string(3) "3=4"
string(2) "rm"
string(3) "4=0"
string(3) "4=1"
string(3) "4=2"
string(3) "4=3"
string(2) "rm"
string(3) "4=4"
array(5) {
[0]=>
NULL
[1]=>
NULL
[2]=>
string(3) "bar"
[3]=>
NULL
[4]=>
NULL
}
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
string(3) "0=0"
string(3) "0=1"
string(2) "rm"
string(3) "0=2"
string(3) "0=3"
string(3) "0=4"
string(3) "1=0"
string(2) "rm"
string(3) "1=1"
string(3) "1=2"
string(3) "1=3"
string(3) "1=4"
string(3) "2=0"
string(3) "2=1"
string(3) "2=2"
string(3) "2=3"
string(3) "2=4"
string(3) "3=0"
string(3) "3=1"
string(3) "3=2"
string(3) "3=3"
string(3) "3=4"
string(2) "rm"
string(3) "4=0"
string(3) "4=1"
string(3) "4=2"
string(3) "4=3"
string(2) "rm"
string(3) "4=4"
array(5) {
[0]=>
NULL
[1]=>
NULL
[2]=>
string(3) "bar"
[3]=>
NULL
[4]=>
NULL
}
preferences:
268.13 ms | 403 KiB | 291 Q