DOMDocument::xinclude()

(PHP 5, PHP 7)

Substitutes XIncludes in a DOMDocument Object

说明

publicDOMDocument::xinclude([int $options= 0]): int

This method substitutes » XIncludes in a DOMDocument object.

Note:

Due to libxml2 automatically resolving entities, this method will produce unexpected results if the included XML file have an attached DTD.

参数

$options

libxml parameters. Available since PHP 5.1.0 and Libxml 2.6.7.

返回值

Returns the number of XIncludes in the document,-1 if some processing failed, or FALSE if there were no substitutions.

范例

Example #1 DOMDocument::xinclude()example

<?php
$xml = <<<EOD
<?xml version="1.0" ?>
<chapter xmlns:xi="http://www.w3.org/2001/XInclude">
 <title>Books of the other guy..</title>
 <para>
  <xi:include href="book.xml">
   <xi:fallback>
    <error>xinclude: book.xml not found</error>
   </xi:fallback>
  </xi:include>
 </para>
</chapter>
EOD;
$dom = new DOMDocument;
// let's have a nice output
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;
// load the XML string defined above
$dom->loadXML($xml);
// substitute xincludes
$dom->xinclude();
echo $dom->saveXML();
?>

以上例程的输出类似于：

<?xml version="1.0"?>
<chapter xmlns:xi="http://www.w3.org/2001/XInclude">
  <title>Books of the other guy..</title>
  <para>
    <row xml:base="/home/didou/book.xml">
       <entry>The Grapes of Wrath</entry>
       <entry>John Steinbeck</entry>
       <entry>en</entry>
       <entry>0140186409</entry>
      </row>
    <row xml:base="/home/didou/book.xml">
       <entry>The Pearl</entry>
       <entry>John Steinbeck</entry>
       <entry>en</entry>
       <entry>014017737X</entry>
      </row>
    <row xml:base="/home/didou/book.xml">
       <entry>Samarcande</entry>
       <entry>Amine Maalouf</entry>
       <entry>fr</entry>
       <entry>2253051209</entry>
      </row>
  </para>
</chapter>

If you use the loadXML() method instead of the load() one (let's say, to process the XML string before loading and parsing it), you will have problems with xinclude(), because the parser will not know where to find the files to include.
Using chdir() before xinclude() will not help.
The solution is to set the documentURI property of the DOMDocument object accordingly to it's original filename, and everything will work fine !
<?php
$xml = file_get_contents($file);
$xml = do_something_with($xml);
$doc = new DOMDocument;
$doc->documentURI = $file;
$doc->loadXML($xml);
$doc->xinclude();
?>