[SOLVED] Validate variable - Numbers only

[daveh33]

$number = $_POST['UserMobile'];
if(ereg("^[0-9]{11}$", $number)) {
$mobile = $number;
}

 

I use the above code at the moment to validate the input of a users mobile - the code above basically just checks that the variable is numeric only and has 11 digits.

 

How can it be developed so that it also checks that the number starts 07?

[GingerRobot]

Try:

 

<?php
$number = $_POST['UserMobile'];
if(ereg("^07[0-9]{9}$",$number)){
$mobile = $number;
}
?>

[awpti]

<?php

$usermobile = $_POST['UserMobile'];

if(strpos($usermobile, '07') === 0 && ctype_digit($usermobile))
{
echo 'Good number';
}
else
{
echo 'bad number';
}

?>

 

Bit more bloated from a code perspective, but it's faster than using regex functions. If your site gets busy, this will be more efficient (in the long run)