Generate regular expression dynamically that accepts Mobile ph. with country code and number length

sachin

I want to pass multiple county codes and length of Mobile phone number to create a reguar expression that validates the Mobile number on behalf of passed country code and length

sachin

$regex = "";

$consecutive_array = array();

$only_numbers = 1;
$add_wl_cc = array('1','41','91');
$callerid_len = array('9','10','12','13','14','15','18');
$callerid_len = array_map(function($arr){return (int)$arr;}, $callerid_len);
sort($callerid_len);

if($add_wl_cc){
    $regex = "^(".implode('|', $add_wl_cc).")".$regex;
}

if($callerid_len){
    $temp = array();
    array_push($temp, $callerid_len[0]);
    for ($i=1; $i < sizeof($callerid_len); $i++) { 
        if($callerid_len[$i-1]+1 == $callerid_len[$i]){
            $temp[] = $callerid_len[$i];
        }else{
            $consecutive_array[] = $temp;
            $temp = array();
            $temp[] = $callerid_len[$i];
        }

        if($i == sizeof($callerid_len) - 1){
            $consecutive_array[] = $temp;
            $temp = array();
        }
    }

    $consecutive_array = array_map(function($arr){
        $len = sizeof($arr);
        if($len == 1){
            return "\\d{".$arr[0]."}";
        }else{
            return "\\d{".$arr[0].",".end($arr)."}";
        }
    }, $consecutive_array);
    $regex = $regex."(".implode('|', $consecutive_array).")";
}elseif($only_numbers){
    $regex = "(\d{8,15})";
}

$regex = $regex."$";

echo "<pre>";
print_r($consecutive_array);
echo "</pre>";


echo $regex;
echo '<br>';

Result will be
^(1|41|91)(\d{9,10}|\d{12,15}|\d{18})$
which will accepts numbers start with 1,41,91 having lenghth 9,10,12,13,14,15,18