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xdiff_string_patch

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(PECL xdiff >= 0.2.0)

xdiff_string_patch — Patch a string with an unified diff

Description

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

Patches a str string with an unified patch in patch parameter and returns the result. patch has to be an unified diff created by xdiff_file_diff()/xdiff_string_diff() function. An optional flags parameter specifies mode of operation. Any rejected parts of the patch will be stored inside error variable if it is provided.

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Parameters

str

The original string.

patch

The unified patch string. It has to be created using xdiff_string_diff(), xdiff_file_diff() functions or compatible tools.

flags

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

Starting from version 1.5.0, you can also use binary OR to enable XDIFF_PATCH_IGNORESPACE flag.

error

If provided then rejected parts are stored inside this variable.

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Return Values

Returns the patched string, or FALSE on error.

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Examples

Example #1 xdiff_string_patch() example

The following code applies changes to some article.

<?php
$old_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)) {
    echo "New article:\n";
    echo $new_article;
}

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

?>

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-function.xdiff-string-patch.html

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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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