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@ 2016-01-13T16:55:57Z

<?php

$a= [['a', 10], ['b', 11], ['c', 12], ['d', 13]];

$b = [['k', 21], ['l', 22], ['m', 23]];

$diff = array_udiff($a, $b, function($o1, $o2) {
    echo 'comparing ' . $o1[0] . ', ' . $o2[0] . PHP_EOL;
    return $o1[1] - $o2[1];
});

var_dump($diff);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_udiff: documentation ( source)

preferences:dark modelive preview

45.79 ms | 402 KiB | 5 Q