Number of digits in a string

[Foser]

I'm looking for a function which can check how many digits are in a string like something like this...

 

 

 

$string

 

$digitnumber = check_number($string);

 

I'd like something like this so there is a minimum of 5 digits in something.

[Ken2k7]

Well first of all, is the string completely numerical? You can use ctype_digit to check if the entire string is numberic. If it's not I think you'll have to use preg_match and RegExp.

 

Not tested, but here's preg_match: (this will check the whole string and see if there are any string with 5 chars long digits. If you want to check if all strings of digits have 5 chars, you have to modify that.)

<?php
$string = "a string to match with";
$digits = false;
preg_match("/(\d+)/", $string, $reg);
foreach ($reg as $match){
if (strlen($match) >= 5) $digits = true;
}
echo $digits; //will either be true of false
?>