KevBurnsJr

validate_phone("16505217791x1234") == "(650)521-7791 x1234";
validate_phone("16505217791x")     == "(650)521-7791";
validate_phone("6505217791")       == "(650)521-7791";
validate_phone("1234567890")       == null;
validate_phone("12345678901")      == "(234)567-8901";

function validate_phone($num) {
    $num = preg_replace("/[^x0-9]/",'',$num);
    $num = preg_replace("/^1/",'',$num);
    $regx = "/^([2-9][0-8][0-9])([2-9][0-9]{2})([0-9]{4})x?([0-9]{1,})?$/";
    $match = preg_match($regx, $num, $m);
    if($match) {
        return "(".$m[1].")".$m[2]."-".$m[3].($m[4]?" x".$m[4]:"");
    }
}

function validate_phone(num) {
    num = num.replace(/[^x0-9]/g,'')
    num = num.replace(/^1/,'');
    var regx = /^([2-9][0-8][0-9])([2-9][0-9]{2})([0-9]{4})x?([0-9]{1,})?$/;
    var m = num.match(regx);
    if(m) {
        return "("+m[1]+")"+m[2]+"-"+m[3]+(m[4]!=undefined?' x'+m[4]:'');
    }
}