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@ 2014-06-19T09:43:33Z

<?php
function remNum( $text )
{
    //echo preg_replace("/[^0-9]/","",$text);
echo preg_replace("/[^a-z]/","",$text); 
}


remNum("123wret456fgh678");
?>

Output
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preg_replace: documentation ( source)

preferences:dark modelive preview

35.15 ms | 402 KiB | 5 Q