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@ 2015-10-21T19:19:59Z

<?php

$str = "PD-W3-SSO-ID";
if ( ! preg_match("/^[a-zA-Z0-9:_\/-|\.]+$/", $str))
                {
                        echo 'Disallowed Key Characters.'. $str;
                }

Output
Performance
VLD
References
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preg_match: documentation ( source)

preferences:dark modelive preview

50.86 ms | 402 KiB | 5 Q