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@ 2017-06-30T22:01:53Z

<?php

function test($firstValue, $secondValue) {
    if ($firstValue > $secondValue) {
        return 1;
    }
    if ($firstValue < $secondValue) {
        return -1;
    }
    return 0;
}
$array = array('a', 'b', 'a', 'b', 'c');
usort($array, 'test');
echo print_r($array);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
usort: documentation ( source)

preferences:dark modelive preview

45.25 ms | 402 KiB | 5 Q