Question

I need a regular expression that can match an unknown number of groupings in PHP.

For example, say I have the string 23434_234_234_234234_234_2342_234. I need my match array to contain each grouping. The number of groupings can range from 1 to potentially infinity.

Yes, I realize this could be done by just chopping up the string and using the underscore as the separator, but this is an exercise in regular expressions, not string manipulation.

Answer 1

Try this:

$string = '23434_234_234_234234_234_2342_234';
$pattern = '/([0-9]+)/';

preg_match_all($pattern, $string, $matches);

var_dump($matches);