# xdiff_file_bdiff_size

(PECL xdiff >= 1.5.0)

xdiff_file_bdiff_size — Read a size of file created by applying a binary diff

### 说明

xdiff_file_bdiff_size ( string `$file` ) : int

Returns a size of a result file that would be created after applying binary patch from file `file` to the original file.

### 参数

`file`

  The path to the binary patch created by xdiff_string_bdiff() or xdiff_string_rabdiff() function.

### 返回值

Returns the size of file that would be created.

### 范例

Example #1 xdiff_file_bdiff_size() example

The following code applies reads a size of file that would be created after applying a binary diff.

    <?php
    $length = xdiff_string_bdiff_size('file.bdiff');
    echo "Resulting file will be $length bytes long";
    ?>

### 参见

- xdiff_file_bdiff() - Make binary diff of two files
- xdiff_file_rabdiff() - Make binary diff of two files using the Rabin's polynomial fingerprinting algorithm
- xdiff_file_bpatch() - Patch a file with a binary diff