The concrete Application of xpath in php and xml programming

This article introduces the relevant knowledge of "the specific application of xpath in php and xml programming". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The core idea of xpath design: quickly locate the elements (or nodes) you need. After the PHP file loads the xml file and creates the DOMDocument object, you can begin to create the DOMXPath object. The form of establishment is as follows:

The copy code is as follows:

$xpath = new DOMXPath ($xmldoc)

After creating the DOMXPath object, you can start using the DOMXPath::query () method to find the elements you need:

The copy code is as follows:

$item = $xpath- > query ("xpath path expression"); / / the returned value is DOMNodList object

Example:

Xml documents: words.xml

The copy code is as follows:

Boy

Boy

Girl

girl

Teacher

Teacher

Beauty

Beauty

Xpath application: index.php

The copy code is as follows:

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