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@ 2021-11-03T00:51:54Z

<?php

$values = [10, 10, 5, 8];

$found = [];
foreach ($values as $index => $value) {
    if (!isset($found[$value])) {
        $found[$value] = $index;
    } else {
        unset($values[$index], $values[$found[$value]]);
    }
}
var_export($values);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)

preferences:dark modelive previewkey bindings

27.61 ms | 404 KiB | 5 Q