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@ 2013-07-17T20:03:12Z

<?php
$myString="abc123";
if( preg_match('([a-zA-Z].*[0-9]|[0-9].*[a-zA-Z])', $myString) ) 
{ 
    echo('Has numbers and letters.');
} else {
    echo("no");
}

Output
Performance
VLD
References
Branches

preg_match: documentation ( source)

preferences:dark modelive preview

37.72 ms | 402 KiB | 5 Q