PHP - Get length of digits in a number

Question

I would like to ask how I can get the length of digits in an Integer. For example:

$num = 245354;
$numlength = mb_strlen($num);

$numl

Answer 1

Just using some version of (int)(log($num,10)+1) fails for 10, 100, 1000, etc. It counts the number 10 as 1 digit, 100 as two digits, etc. It also fails with 0 or any negative number.
If you must use math (and the number is non-negative), use:
$numlength = (int)(log($num+1, 10)+1);

Or for a math solution that counts the digits in positive OR negative numbers:
$numlength = ($num>=0) ? (int)(log($num+1, 10)+1) : (int)(log(1-$num, 10)+1);

But the strlen solution is just about as fast in PHP.

Answer 2

In PHP types are loosely set and guessed, if you want to see something as a string if it is an integer, float, and (i have not tried this) bool then @Gorjunav is the most correct answer.

Reset the variable as a string

$stringNum = (string) $num;

Then you can go anything string related you want with it! And vice-versa for changing a string to an int

$number = (int) $stringNum;

and so on...

Answer 3

echo strlen((string) abs($num)); // using **abs** it'll work with negative integers as well  

Answer 4

Maybe:

$num = 245354;
$numlength = strlen((string)$num);