(PECL svn >= 0.1.0)

svn_diffRecursively diffs two paths


svn_diff ( string $path1 , int $rev1 , string $path2 , int $rev2 ) : array

Recursively diffs two paths, path1 and path2.


This is not a general-purpose diff utility. Only local files that are versioned may be diffed: other files will fail.



First path to diff. This can be a URL to a file/directory in an SVN repository or a local file/directory path.

Hinweis: Relative Pfade werden so aufgelöst, als ob das aktuelle Verzeichnis das wäre, in dem sich das PHP-Binary befindet. Um stattdessen das aktuelle Verzeichnis des aufrufenden Skripts zu nutzen, müssen sie die realpath()-Funktion oder dirname(__FILE__) zu Hilfe ziehen.


If a local file path has only backslashes and no forward slashes, this extension will fail to find the path. Always replace all backslashes with forward slashes when using this function.


First path's revision number. Use SVN_REVISION_HEAD to specify the most recent revision.


Second path to diff. See path1 for description.


Second path's revision number. See rev1 for description.


Returns an array-list consisting of two streams: the first is the diff output and the second contains error stream output. The streams can be read using fread(). Returns false or null on error.

The diff output will, by default, be in the form of Subversion's custom unified diff format, but an » external diff engine may be used depending on Subversion's configuration.


Beispiel #1 Basic example

This example demonstrates the basic usage of this function, and the retrieval of contents from the stream:

list($diff$errors) = svn_diff(
if (!
$diff) exit;
$contents '';
while (!
feof($diff)) {
$contents .= fread($diff8192);

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

---        (.../foo) (revision 23)
+++ (.../foo) (revision 27)
 // further diff output

Beispiel #2 Diffing two revisions of a repository path

This example implements a wrapper function that allows a user to easily diff two revisions of the same item using an external repository path (the default syntax is somewhat verbose):

function svn_diff_same_item($path$rev1$rev2) {

Beispiel #3 Portably diffing two local files

This example implements a wrapper function that portably diffs two local files, compensating for the realpath() fix and the backslashes bug:

function svn_diff_local($path1$rev1$path2$rev2) {
$path1 str_replace('\\''/'realpath($path1));
$path2 str_replace('\\''/'realpath($path2));



Diese Funktion ist EXPERIMENTELL. Das Verhalten, der Funktionsname und die die zugehörige Dokumentation, können sich in zukünftigen PHP-Versionen ohne Ankündigung ändern. Seien Sie gewarnt und verwenden Sie diese Funktion auf eigenes Risiko.

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