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PHP: xpath_eval_expression - Manual

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xpath_eval

domxml_xslt_version

Last updated: Wed, 19 Mar 2008

xpath_eval_expression

(PHP 4 >= 4.0.4)

xpath_eval_expression — Evaluates the XPath Location Path in the given string

说明

XPathContext

XPathObject xpath_eval_expression ( string $expression [, domnode $contextnode ] )

XPathObject xpath_eval_expression ( XPathContext $xpath_context , string $expression [, domnode $contextnode ] )

Example#1 xpath_eval_expression() Example

  <?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'  )); 
 
  ?>

上例将输出：

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)
     }
  }
}