Question

Lately, I’ve been wondering how to find the difference between two files with PHP. Lets say for example I have one text files that says:

"Line one data = test test"

Then one file that says:

"Line one data = test test Line two data = test test"

What I want to do is output the difference between the two files which would be:

"Line two data = test test"

How can I accomplish this with PHP? Any help would be highly appreciated!

Answer 1

Cast the text files to strings then use str_replace()

$one = "Line one data = test test";
$two = "Line one data = test test Line two data = test test";

$difference = str_replace($one, "", $two);

Or use str_ireplace for case-sensitive replacing.