xdiff_string_patch --  Patch a string with an unified diff


string xdiff_string_patch ( string str, string patch [, int flags [, string &error]] )

xdiff_string_patch() patches string str with unified patch in string patch.

flags can be either XDIFF_PATCH_NORMAL (default mode, normal patch) or XDIFF_PATCH_REVERSE (reversed patch).

If error is passed then rejected parts are stored inside this variable.

Example 1. xdiff_string_patch() example

The following code applies changes to some article.

= file_get_contents('./old_article.txt');
$diff = $_SERVER['patch']; /* Let's say that someone pasted a patch to html form */

$errors = '';

$new_article = xdiff_string_patch($old_article, $diff, XDIFF_PATCH_NORMAL, $errors);
if (
is_string($new_article)) {
"New article:\n";

if (
strlen($errors)) {
"Rejects: \n";


Returns a patched string.

See also xdiff_file_patch().

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