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@ 2015-04-30T08:42:25Z

<?php

$digits = '1234567890';
$alnum  = '123test';

For($i = 0; $i < 100000; $i++) {
strspn($digits, $digits) === strlen($digits);
strspn($alnum, $digits) === strlen($alnum);
}

Output
Performance
VLD
References
Branches

strspn: documentation ( source)

preferences:dark modelive preview

46.33 ms | 402 KiB | 5 Q