codice: $stringa = 'ciao'; if(preg_match( '/^[[:alpha:][:digit:]]+$/', $stringa )) echo 'ok'; else echo 'no';
$stringa = 'ciao'; if(preg_match( '/^[[:alpha:][:digit:]]+$/', $stringa )) echo 'ok'; else echo 'no';
think simple think ringo
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