总是得到x数量的数字

Question

I have a function that generates a random number, like:

$int = random_number();

Generally, the results are 6 digits, but occasionally, it ends up being less than 6 digits. How do I add zeros to the number if it is less than 6 digits? For example, if $int is 12345, I turn it into 123450.

I can easily do this with something like:

if (strlen($int) == 5) {
   $int = $int.'0';
} elseif(strlen($int) == 4){
   $int = $int.'00';
} //etc

But clearly there must be a better way?

Answer 1

strpadding this is called.

See here: https://secure.php.net/manual/en/function.str-pad.php

Example:

echo str_pad($yourRandomNumber, 6, "0", STR_PAD_LEFT);