Question

I have been fiddling with this for almost an hour and am getting nowhere. Regexes are not my strong suit.

I have data like the following:

.cke_button_about .cke_icon { background-position: 0 -76px; }
.cke_button_maximize .cke_icon { background-position: 0 -108px; }

I need to replace the vertical values (-76px and -108px) using preg_replace_callback(). The callback function is written, but I can’t for the life of me get the numbers out properly.

This works fine for 4-digit numbers:

preg_replace_callback("/(background\-position\:)(.*)(\d{4})(px)/", "recalculate",
$css_string);

but how can I make it so it recognizes any kind of number? {1-4} should work but somehow conflicts with the first, horizontal value.

Would anybody like to help me out?

Thanks in advance.

Answer 1

/(background\-position\:)(\D*\d*\D*)(\d+)(px)/

Gets what you want while preserving the current capturing groupings.