<div> <label for="phone">Enter your phone number:</label> <input type="tel" id="phone" name="phone" pattern="+94[7-9]{2}-[0-9]{3}-[0-9]{4}" value="+94"> </div>
$phone = '000-0000-0000'; if(preg_match("/^[0-9]{3}-[0-9]{4}-[0-9]{4}$/", $phone)) { // $phone is valid }