I recently found a need to find the longest common substring in an array of strings in PHP. A couple of Google searches didn’t return any relevant solutions, so I decided to roll my own. I haven’t benchmarked this yet for large strings and/or arrays, but it does what I needed it to for my own purpose.
[gist id=1021218 file=longest_common_substring.php]
[gist id=1021218 file=longest_common_substring_example.php]