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@ 2012-07-02T22:57:34Z

<?php
$numbers = range(1, 21);
shuffle($numbers);
foreach ($numbers as $number) {
    echo "$number ";
}

Output
Performance
VLD
References
Branches

shuffle: documentation ( source)
range: documentation ( source)

preferences:dark modelive previewkey bindings

65.35 ms | 1793 KiB | 5 Q