php - How to use regular expressions to match gzinflate(base64_decode(

I'm writing the Yara rules. I tried using regular expression matching to remove the gzinflate(base64_decode(. But in PHP, function names can be concatenated with strings. Just like this

eval("\$x=gzin"."flate(base"."64_de"."code()));

There are various ways of stitching. Except for trying to match "." after every letter. Is there a better solution? Any help please.

Solution:

You could create an array, then implode it:

$array = ["\$x=gzin", "flate(base", "64_de", "code()"];

$str = implode($array);