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 html

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

Filename: index.php php

<?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;
?>

Output:

second

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

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

Filename: index.php php

<?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;
    }
}
?>

Output:

geeksforgeeks

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