MD5 hash validation with PHP

preg_match('/(?<![a-z0-9])[a-f0-9]{32}(?![a-z0-9])/i', '123456789024567d890f123456789012',$result);

Result :

Array
(
    [0] => 123456789024567d890f123456789012
)
January 17, 2009 | Filed Under PHP 

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