Question

I need to extract two seperate information from a string.

For example,

$string = 'int(5)';
//Now I need "int" and the text inside the brackets "5" seperately;
$datatype = ?
$varlength = ?

How to extract those information?

Answer 1

Use this regex

^([a-z]+)\(([0-9]+)\)$

if (preg_match('~^([a-z]+)\(([0-9]+)\)$~i', 'int(5)', $matches)) {
  $datatype  = $matches[1]; // int
  $varlength = $matches[2]; // 5
}

---

EDIT

If you want to match more than just a number in the brackets, expand it as necessary:

^([a-z]+)\(([0-9a-zA-Z, ]+)\)$ // numbers, letters, comma or space
^([a-z]+)\(([^)]+)\)$          // anything but a closing bracket