PHP preg_replace_callback, replace only 1 backreference?

Question

Using preg_replace_callback, is it possible to replace only one backreference? Or do I have to return the entire thing?

I\'m just trying to wrap the tok

Answer 1

I recently came up with a way more simple way of doing this. For example; if I want to match \w+\d+\w+ and only change the digits.

$value = preg_replace_callback('~(\w+)(\d+)(\w+)~', function($match) {
    $match[2] = $match[2] * 2;//Do whatever I want to $match[2]
    return $match[1] . $match[2] . $match[3];
}, $value);

Very clean!