該擴展能夠產生兩個XML文檔的差異，然后將差異應用于源文檔。diff是一個XML文檔，其中包含人類可讀格式的復制/插入/刪除指令節點。可以處理DOMDocument對象，本地文件和內存中的字符串 [https://pecl.php.net/package/xmldiff](https://pecl.php.net/package/xmldiff). * [XMLDiff \\ Base](https://www.php.net/manual/en/class.xmldiff-base.php)— XMLDiff \\ Base類 * [XMLDiff \\ Base :: \_\_ construct](https://www.php.net/manual/en/xmldiff-base.construct.php)—構造函數 * [XMLDiff \\ Base :: diff](https://www.php.net/manual/en/xmldiff-base.diff.php)—產生兩個XML文檔的差異 * [XMLDiff \\ Base :: merge](https://www.php.net/manual/en/xmldiff-base.merge.php)—基于diff生成新的XML文檔 * [XMLDiff \\ DOM](https://www.php.net/manual/en/class.xmldiff-dom.php)— XMLDiff \\ DOM類 * [XMLDiff \\ DOM :: diff](https://www.php.net/manual/en/xmldiff-dom.diff.php)—[區分](https://www.php.net/manual/en/xmldiff-dom.diff.php)兩個DOMDocument對象 * [XMLDiff \\ DOM :: merge-](https://www.php.net/manual/en/xmldiff-dom.merge.php)生成合并的DOMDocument * [XMLDiff \\ Memory](https://www.php.net/manual/en/class.xmldiff-memory.php)— XMLDiff \\ Memory類 * [XMLDiff \\ Memory :: diff](https://www.php.net/manual/en/xmldiff-memory.diff.php)—[區分](https://www.php.net/manual/en/xmldiff-memory.diff.php)兩個XML文檔 * [XMLDiff \\ Memory :: merge-](https://www.php.net/manual/en/xmldiff-memory.merge.php)生成合并的XML文檔 * [XMLDiff \\ File](https://www.php.net/manual/en/class.xmldiff-file.php)— XMLDiff \\ File類 * [XMLDiff \\ File :: diff](https://www.php.net/manual/en/xmldiff-file.diff.php)—[區分](https://www.php.net/manual/en/xmldiff-file.diff.php)兩個XML文件 * [XMLDiff \\ File :: merge-](https://www.php.net/manual/en/xmldiff-file.merge.php)生成合并的XML文檔