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PHP5中文手册
SVN
PHP Manual

svn_diff

(PECL svn:0.1-0.2)

svn_diff — Recursively diffs two paths

说明

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

Recursively diffs two paths, path1 and path2 .

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

参数

path1

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

Note: Relative paths will be resolved as if the current working directory was the one that contains the PHP binary. To use the calling script's working directory, use realpath() or dirname(__FILE__).

Warning

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.

rev1

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

path2

Second path to diff. See path1 for description.

rev2

Second path's revision number. See rev2 for description.

返回值

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.

注释

Warning

本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。

范例

Example#1 Basic example

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

<?php
list($diff, $errors) = svn_diff(
    'http://www.example.com/svnroot/trunk/foo', SVN_REVISION_HEAD,
    'http://www.example.com/svnroot/branches/dev/foo', SVN_REVISION_HEAD
);
if (!$diff) exit;
$contents = '';
while (!feof($diff)) {
  $contents .= fread($diff, 8192);
}
fclose($diff);
fclose($errors);
var_dump($contents);
?>

上例将输出：

Index: http://www.example.com/svnroot/trunk/foo
===================================================================
--- http://www.example.com/svnroot/trunk/foo        (.../foo) (revision 23)
+++ http://www.example.com/svnroot/branches/dev/foo (.../foo) (revision 27)
 // further diff output

Example#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):

<?php
function svn_diff_same_item($path, $rev1, $rev2) {
    return svn_diff($path, $rev1, $path, $rev2);
}
?>

Example#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:

<?php
function svn_diff_local($path1, $rev1, $path2, $rev2) {
    $path1 = str_replace('\\', '/', realpath($path1));
    $path2 = str_replace('\\', '/', realpath($path2));
    return svn_diff($path1, $rev1, $path2, $rev2);
}
?>

参见

SVN
PHP Manual