PHP XMLReader::getAttributeNo() Function

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Definition and Usage

XML is a mark-up language to share the data across the web, XML is for both human read-able and machine read-able. XMLReader extension is used to read/retrieve the contents of an XML document i.e. using the methods of the XMLReader class you can read each node of an XML document.

The XMLReader::getAttributeNo() function of the XMLReader class accepts an integer value representing the index of an attribute and returns its value.

Syntax

XMLReader::getAttributeNo($index);

Parameters

Return Values

This function returns a string value representing the value of the specified attribute. If the specified attribute does not exist this function returns NULL.

PHP Version

This function was first introduced in PHP Version 5 and works in all the later versions.

Example

Following example demonstrates the usage of the XMLReader::getAttributeNo() function −

data.xml

<Employee>
   <Name id = "name">Krishna</Name>
   <Age id = "age">22</Age>
   <City id = "city">Hyderabad</City>   
   <Phone id = "phone">Hyderabad</Phone>   
</Employee>

sample.php

<?php
   //Creating an XMLReader
   $reader = new XMLReader();

   //Opening a reader
   $reader->open('trail.xml');

   //reading the contents of the XML file
   while($reader->read()){
      if ($reader->nodeType == XMLREADER::ELEMENT) { 
         $res = $reader->getAttributeNo(0); 
         print($res."\n");
      }
   }
   //Closing the reader
   $reader->close();
?>

This will produce following result −

name
age
city
phone

Example

Following is another example of this function −

test.xml

<data> 
   <name att = 'test_attribute'>Raju</name> 
   <age>32</age> 
   <phone>9848022338</phone> 
	<city>Hyderabad</city>
</data>

sample.php

<?php
   //Creating an XMLReader
   $reader = new XMLReader();

   //Opening a reader
   $reader->open("test.xml");

   //Reading the contents
   $reader->next();
   $reader->read();
   $reader->next();
   print($reader->getAttributeNo(0)."\n");

   //Closing the reader
   $reader->close();
?>

This will produce following result −

test_attribute

Example

<?php
   //Creating an XMLReader
   $reader = new XMLReader();

   $data = "<data> 
      <name att = 'test_attribute'>Raju</name> 
      <age>32</age> 
      <phone>9848022338</phone> 
      <city>Hyderabad</city>
   </data>";

   //Opening a reader
   $reader->xml($data);

   //Reading the contents
   $reader->next();
   $reader->read();
   $reader->next();
   print($reader->getAttributeNo(0)."\n");

   //Closing the reader
   $reader->close();
?>

This will produce following result −

test_attribute