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@ 2013-07-30T08:16:38Z

<?php

$text = 'yachtsmanship';
$alphabet = 'abcdefghijklmnopqrstuvwxyz';
$result = $alphabet;

foreach (str_split($text) as $char) {
    $result = str_replace($char,'',$result);
}
echo $result;

Output
Performance
VLD
References
Branches

str_replace: documentation ( source)
str_split: documentation ( source)

preferences:dark modelive preview

41.32 ms | 402 KiB | 5 Q