Formatting Phone Numbers in PHP

Question

I am working on an SMS app and need to be able to convert the sender\'s phone number from +11234567890 to 123-456-7890 so it can be compared to re

Answer 1

It's faster than RegEx.

$input = "0987654321"; 

$output = substr($input, -10, -7) . "-" . substr($input, -7, -4) . "-" . substr($input, -4); 
echo $output;

Answer 2

Please have a look at substr based function that can change formats

function phone(string $in): string
{
    $FORMAT_PHONE = [1,3,3,4];
    $result =[];
    $position = 0;
    foreach ($FORMAT_PHONE as $key => $item){
        $result[] = substr($in, $position, $item);
        $position += $item;
    }
    return '+'.implode('-',$result);
}

Answer 3

$data = '+11234567890';

if(  preg_match( '/^\+\d(\d{3})(\d{3})(\d{4})$/', $data,  $matches ) )
{
    $result = $matches[1] . '-' .$matches[2] . '-' . $matches[3];
    return $result;
}

Answer 4

Phone numbers are hard. For a more robust, international solution, I would recommend this well-maintained PHP port of Google's libphonenumber library.

Using it like this,

use libphonenumber\NumberParseException;
use libphonenumber\PhoneNumber;
use libphonenumber\PhoneNumberFormat;
use libphonenumber\PhoneNumberUtil;

$phoneUtil = PhoneNumberUtil::getInstance();

$numberString = "+12123456789";

try {
    $numberPrototype = $phoneUtil->parse($numberString, "US");

    echo "Input: " .          $numberString . "\n";
    echo "isValid: " .       ($phoneUtil->isValidNumber($numberPrototype) ? "true" : "false") . "\n";
    echo "E164: " .           $phoneUtil->format($numberPrototype, PhoneNumberFormat::E164) . "\n";
    echo "National: " .       $phoneUtil->format($numberPrototype, PhoneNumberFormat::NATIONAL) . "\n";
    echo "International: " .  $phoneUtil->format($numberPrototype, PhoneNumberFormat::INTERNATIONAL) . "\n";
} catch (NumberParseException $e) {
    // handle any errors
}

you will get the following output:

Input: +12123456789
isValid: true
E164: +12123456789
National: (212) 345-6789
International: +1 212-345-6789

I'd recommend using the E164 format for duplicate checks. You could also check whether the number is a actually mobile number or not (using PhoneNumberUtil::getNumberType()), or whether it's even a US number (using PhoneNumberUtil::getRegionCodeForNumber()).

As a bonus, the library can handle pretty much any input. If you, for instance, choose to run 1-800-JETBLUE through the code above, you will get

Input: 1-800-JETBLUE
isValid: true
E164: +18005382583
National: (800) 538-2583
International: +1 800-538-2583

Neato.

It works just as nicely for countries other than the US. Just use another ISO country code in the parse() argument.

Answer 5

This is for UK landlines without the Country Code

function format_phone_number($number) {
    $result = preg_replace('~.*(\d{2})[^\d]{0,7}(\d{4})[^\d]{0,7}(\d{4}).*~', '$1 $2 $3', $number);
    return $result;
}

Result:

2012345678
becomes
20 1234 5678

Answer 6

Don't reinvent the wheel! Import this amazing library:
https://github.com/giggsey/libphonenumber-for-php

$defaultCountry = 'SE'; // Based on the country of the user
$phoneUtil = PhoneNumberUtil::getInstance();
$swissNumberProto = $phoneUtil->parse($phoneNumber, $defaultCountry);

return $phoneUtil->format($swissNumberProto, PhoneNumberFormat::INTERNATIONAL);

It is based on Google's library for parsing, formatting, and validating international phone numbers: https://github.com/google/libphonenumber