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@ 2017-07-12T08:27:39Z

<?php

$a = 0;
for ($i = 0; $i < 5; ++$i)
    var_dump(++$a);
for ($i = 0; $i < 5; ++$i)
    var_dump(str_pad($a, 3, '0', STR_PAD_LEFT));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
str_pad: documentation ( source)

preferences:dark modelive preview

49.56 ms | 402 KiB | 5 Q