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@ 2013-08-01T21:57:33Z

<?php

    if (!preg_match("^[a-zA-Z0-9.-_]+\@[a-zA-Z0-9.-_]\+.[a-zA-Z0-9.-_]+$",$email));
    die ("Not a valid email format!");

Output
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VLD
References
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preg_match: documentation ( source)

preferences:dark modelive preview

38.2 ms | 402 KiB | 5 Q