# xdiff_file_patch

(PECL xdiff >= 0.2.0)

xdiff_file_patch — Patch a file with an unified diff

### 说明

xdiff_file_patch ( string `$file` , string `$patch` , string `$dest` [, int `$flags` = DIFF_PATCH_NORMAL ] ) : mixed

Patches a `file` with a `patch` and stores the result in a file. `patch` has to be an unified diff created by xdiff_file_diff()/xdiff_string_diff() function. An optional `flags` parameter specifies mode of operation.

### 参数

`file`

  The original file.

`patch`

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

`dest`

  Path of the resulting file.

`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.

### 返回值

Returns `FALSE` if an internal error happened, string with rejected chunks if patch couldn't be applied or `TRUE` if patch has been successfully applied.

### 范例

Example #1 xdiff_file_patch() example

The following code applies unified diff to a file.

    <?php
    $old_version = 'my_script-1.0.php';
    $patch = 'my_script.patch';

    $errors = xdiff_file_patch($old_version, $patch, 'my_script-1.1.php');
    if (is_string($errors)) {
       echo "Rejects:\n";
       echo $errors;
    }

    ?>

Example #2 Patch reversing example

The following code reverses a patch.

    <?php
    $new_version = 'my_script-1.1.php';
    $patch = 'my_script.patch';

    $errors = xdiff_file_patch($new_version, $patch, 'my_script-1.0.php', XDIFF_PATCH_REVERSE);
    if (is_string($errors)) {
       echo "Rejects:\n";
       echo $errors;
    }

    ?>

### 参见

- xdiff_file_diff() - Make unified diff of two files