php - Detecting similar structure of strings in PHP

Question

Assuming I have the following two strings:

START dsad COMMAND5 name

 

START hfhsaklk342cxz COMMAND8 name

 

I want to be able to analyze and find the common structure between the strings:

START ### COMMAND### name

(### marks changing data).

(They all start with "START ", followed by something, then " COMMAND", then something, then " name")

 

Any ideas?