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@ 2018-12-21T14:17:12Z

<?php

$a1 = [1,2,3,4,5];
$a2 = [1,3,5];
$result = [];

foreach($a1 as $item) {
    if (in_array($item, $a2)) {
        $result[] = 'match' . $item;   
    } else {
        $result[] = $item;
    }
}

print_r($result);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
in_array: documentation ( source)

preferences:dark modelive previewkey bindings

29.42 ms | 405 KiB | 5 Q