<?xml version="1.0" encoding="utf-8"?>
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  <refentry xml:id="function.xpath-eval-expression" xmlns="http://docbook.org/ns/docbook">
   <refnamediv>
    <refname>xpath_eval_expression</refname>
    <refpurpose>
     Evaluates the XPath Location Path in the given string 
    </refpurpose>
   </refnamediv>
   <refsect1>
    &reftitle.description;
    <methodsynopsis>
     <type>XPathObject</type><methodname>XPathContext::xpath_eval_expression</methodname>
     <methodparam><type>string</type><parameter>expression</parameter></methodparam>
     <methodparam choice="opt"><type>domnode</type><parameter>contextnode</parameter></methodparam>      
    </methodsynopsis>
    <methodsynopsis>
     <type>XPathObject</type><methodname>xpath_eval_expression</methodname>
     <methodparam><type>XPathContext</type><parameter>xpath_context</parameter></methodparam>
     <methodparam><type>string</type><parameter>expression</parameter></methodparam>
     <methodparam choice="opt"><type>domnode</type><parameter>contextnode</parameter></methodparam>      
    </methodsynopsis>
    <para>
     <example>
      <title><function>xpath_eval_expression</function> Example</title>
      <programlisting role="php">
<![CDATA[
<?php

include("example.inc");

if (!$dom = domxml_open_mem($xmlstr)) {
    echo "Error while parsing the document\n";
    exit;
}

$xpath = xpath_new_context($dom);
var_dump(xpath_eval_expression($xpath, '/chapter/@language'));

?>
]]>
      </programlisting>
      &example.outputs;
      <screen>
<![CDATA[
object(XPathObject)(2) {
   ["type"]=>
   int(1)
   ["nodeset"]=>
   array(1) {
     [0]=>
     object(domattribute)(5) {
       ["type"]=>
       int(2)
       ["name"]=>
       string(8) "language"
       ["value"]=>
       string(2) "en"
       [0]=>
       int(7)
       [1]=>
       int(138004256)
     }
  }
}
]]>
      </screen>
     </example>
    </para>
    <para>
     See also <function>xpath_eval</function>.
    </para>
   </refsect1>
  </refentry>

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