xdiff_string_diff - PHP code example

PHP Function XDiff_String_Diff

Top rated real world PHP examples of xdiff_string_diff

xdiff_string_diff makes a diff between two strings. It works well with both text and binary data. The resulting patch can be later applied using xdiff_file_bpatch()/xdiff_string_rabdiff() or other similar function. It also supports the unified diff format.

Strings in PHP are often broken into smaller components called tokens. Several functions exist to help with this work including: strlen( ) which returns the length of a string; explode( ) which splits a string into its tokens; and strrev( ) which reverses the order of the string's letters. Other useful functions include strtoupper() and strtolower() which change the case of a string, and str_split( ) which returns an array containing parts of a string.

Another useful function for working with strings is xdiff_string_diff(), which makes a unified diff between two strings. The optional context parameter indicates how many lines of context you want to include in the diff result. Set minimal to TRUE if you want to minimize size of diff (can take a long time). Returns string with result or FALSE if an internal error happened.

xdiff_string_diff example

    function diff($from_lines, $to_lines)
    {
        array_walk($from_lines, array('Text_Diff', 'trimNewlines'));
        array_walk($to_lines, array('Text_Diff', 'trimNewlines'));

        /* Convert the two input arrays into strings for xdiff processing. */
        $from_string = implode("\n", $from_lines);
        $to_string = implode("\n", $to_lines);

        /* Diff the two strings and convert the result to an array. */
        $diff = xdiff_string_diff($from_string, $to_string, count($to_lines));
        $diff = explode("\n", $diff);

        /* Walk through the diff one line at a time. We build the $edits * array of diff operations by reading the first character of the * xdiff output (which is in the "unified diff" format). * * Note that we don't have enough information to detect "changed" * lines using this approach, so we can't add Text_Diff_Op_changed * instances to the $edits array. The result is still perfectly * valid, albeit a little less descriptive and efficient. */
        $edits = array();