PHP | XMLReader moveToAttributeNo() Function

The XMLReader::moveToAttributeNo() function is an inbuilt function in PHP which is used to move cursor to an attribute by index. This function is useful when a node is having multiple attributes but we want only specific attributes only.

Syntax:

bool XMLReader::moveToAttributeNo( int $index )

Parameters: This function accepts a single parameter $index which holds the position of the attribute.



Return Value: This function returns TRUE on success or FALSE on failure.

Below given programs illustrate the XMLReader::moveToAttributeNo() function in PHP:

Program 1: In this program, we will get value of second attribute of a specific node.

Filename: data.xml

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<?xml version="1.0" encoding="utf-8"?>
<div>
    <h1 att1="first" attr2="second"> Text </h1>
</div>

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Filename: index.php

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<?php
  
// Create a new XMLReader instance
$XMLReader = new XMLReader();
  
// Open the XML file
$XMLReader->open('data.xml');
  
// Iterate through the XML nodes
// to reach the h1 node
$XMLReader->read();
$XMLReader->read();
$XMLReader->read();
  
// Move to second attribute
// of current node
$XMLReader->moveToAttributeNo(1);
  
// Output the value to browser
echo $XMLReader->value;
?>

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Output:

second

Program 2: In this program, we will get the value of the first attribute of all the nodes.

Filename: data.xml

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<?xml version="1.0" encoding="utf-8"?>
<div>
    <h1 attribute="geeksforgeeks"> Text </h1>
</div>

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Filename: index.php

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<?php
  
// Create a new XMLReader instance
$XMLReader = new XMLReader();
  
// Open the XML file
$XMLReader->open('data.xml');
  
// Iterate through the XML nodes
while ($XMLReader->read()) {
    if ($XMLReader->nodeType == XMLREADER::ELEMENT) {
  
        // Move to first attribute
        $XMLReader->moveToAttributeNo(0);
  
        // Output the value to browser
        echo $XMLReader->value;
    }
}
?>

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Output:

geeksforgeeks

Reference: https://www.php.net/manual/en/xmlreader.movetoattributeno.php




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