PHPExcel. Easybook, book publishing as easy as it should be. PHP Fine Diff. This page demonstrate the FineDiff class (as in “fine granularity diff”) I wrote – starting from scratch – to generate a lossless (won't eat your line breaks), compact opcodes string listing the sequence of atomic actions (copy/delete/insert) necessary to transform one string into another (thereafter referred as the “From” and “To” string).
The “To” string can be rebuilt by running the opcodes string on the “From” string. The FineDiff class allows to specify the granularity, and up to character-level granularity is possible, in order to generate the smallest diff possible (at the potential cost of increased CPU cycles.)