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@ 2020-03-11T08:11:17Z

<?php

$a = [1, 2];
unset($a[1], $a[0]);
$b = $a;

if (mt_rand(0, 1)) {
    $a[] = 3;
}
$b[] = 4;

var_dump($b);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
mt_rand: documentation ( source)

preferences:dark modelive previewkey bindings

32.66 ms | 405 KiB | 5 Q