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@ 2015-05-05T21:48:13Z

<?php
$psm_name = 'Eur-Asia';
if ((preg_match("/^[a-zA-Z0-9&@#_.^\-\s^'\"]+$/", $psm_name))) {
            echo "true";
        }else{ 
        echo "false";
        }

Output
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preg_match: documentation ( source)

preferences:dark modelive preview

47.57 ms | 402 KiB | 5 Q