Clean Mobile Number

[jaymc]

This may be a stupid question but whats the best way to clean a mobile number from invalid chars without messing up the mobile itself

 

Mobile numbers I am having to deal with are for example like this

 

[44] 07783784123

[44] 07783-784-123

[44] 07 783 784 123

[07783784123]

447783784123

 

The end result must be 07783784123

 

Some mobiles can have 10/11 chars in, so it may be difficult to strip out all the bad characters and then just split leaving the last 11 chars..

[gevans]

It may be a quicker process if you just build an array and use str_replace;

 

<?php
function sleanMobileNumber($number) {
$replace = array('[44]', '[', ']', ' ', '-');
$mob_num = str_replace($replace, "", $number);
if(substr($mob_num, 0, 2) == '44') {
	$mob_num = substr_replace($mob_num, '', 0, 2)
}
}

[Adam]

Or you could use:

 

$str = '344frf4335vev4554g256';
$str = preg_replace('/[^0-9]/', '', $str);

if (strlen($str) != 10 && strlen($str) != 11)
{
    print 'Invalid phone number...';
}

 

 

[gevans]

That could still leave you with the following integer/string

 

447783784123

 

That would be deemed invalid.

[Adam]

Ah yes, perhaps this then:

 

$str = '344frf4335vev4554g256';

$str = preg_replace('/[^0-9]/', '', $str);
$str2 = str_replace('44', '', $str);

if (strlen($str2) != 10 && strlen($str2) != 11)
{
    print 'Invalid phone number...';
}

[gevans]

What about this phone number?

 

447783444444

[Adam]

Hah, this then:

 

$str = '344frf4335vev4554g256';

$str = preg_replace('/[^0-9]/', '', $str);
$str2 = preg_replace('/$44/', '', $str);

if (strlen($str2) != 10 && strlen($str2) != 11)
{
    print 'Invalid phone number...';
}

[gevans]

Now you're using two regular expressions where you could save time by just using string functions

 

Both ways will work though!

[Adam]

Ha good point!

[Axeia]

If the op example of 447783784123 wasn't a typo you'd still need to do a

if( substr( $mob_num, 0, 1 ) != '0'  )
{
  $mob_num = '0'.$mob_num;
}

[gevans]

Oh yea, very true.

[nrg_alpha]

If I understand correctly, would something like this be along the lines of what you are looking for?

 

Example:

$phoneNumber = array('[44] 07783784123', '[44] 07783-784-123', '[44] 07 783 784 123', '[07783784123]', '447783784123');
foreach($phoneNumber as $val){
$val = preg_replace('#[^0-9]#', '', $val);
$valLen = strlen($val);
$val = ($valLen == 10 || $valLen == 12 ? substr($val, -10) : ($valLen == 13 || $valLen == 11 ? substr($val, -11) : 'Illegal Format!'));
echo $val . "<br />\n";
}

 

Output:

07783784123
07783784123
07783784123
07783784123
7783784123

 

That ternary operator could also be replaced with the more traditionally readable if() {...}else{...} statement instead:

if($valLen == 10 || $valLen == 12){
	$val = substr($val, -10);
} else if($valLen == 13 || $valLen == 11){
	$val = substr($val, -11);
} else {
	$val = 'Incorrect Format!';
}

 

Just a note:

The end result must be 07783784123

 

I question how this would be with the last example being 447783784123 (unless I'm missing something here).