从字符串中提取未知数字

Question

I have a string like "padding: 0px 0px 0px 0px". The digits are however unknown so the can be 0, 5, 10, 25, 100 or whatever...

What's the best way to extract each of those to a variable?

(i.e. 
$number1 = first number
$number2 = second number
$number3 = third number
$number4 = fourth number)

Answer 1

Haljan,

This should work:

preg_match_all('/([\d]+)px/', $string, $matches);
var_dump($matches);

It matches all numbers that are followed by a "px" and writes them to $matches.