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PHP Quiz PHP CertificatePHP registerXPathNamespace() Function
Complete PHP SimpleXML Reference
Definition and Usage
The registerXPathNamespace() registers a namespace context for the next XPath query.
This function is useful if a namespace prefix is changed in an XML document. The registerXPathNamespace() function will create a prefix for specified namespace, so that the affected XML nodes can be accessed without altering the application code too much.
Syntax
class SimpleXMLElement
{
string registerXPathNamespace(prefix,ns)
}
{
string registerXPathNamespace(prefix,ns)
}
| Parameter | Description |
|---|---|
| prefix | Required. Specifies the namespace prefix |
| ns | Required. Specifies the namespace URL. This must match a namespace in the XML document. |
Example
XML File
<?xml version="1.0" encoding="ISO-8859-1"?>
<note xmlns:b="http://www.w3schools.com/example/">
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<b:body>Don't forget me this weekend!</b:body>
</note>
<note xmlns:b="http://www.w3schools.com/example/">
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<b:body>Don't forget me this weekend!</b:body>
</note>
PHP Code
<?php
$xml = simplexml_load_file("test.xml");
$xml->registerXPathNamespace("msg",
"http://www.w3schools.com/example/");
$result = $xml->xpath("msg:body");
foreach ($result as $message)
{
echo $message;
}
?>
$xml = simplexml_load_file("test.xml");
$xml->registerXPathNamespace("msg",
"http://www.w3schools.com/example/");
$result = $xml->xpath("msg:body");
foreach ($result as $message)
{
echo $message;
}
?>
The output of the code above will be:
Don't forget me this weekend!
Complete PHP SimpleXML Reference
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