PHP DOMDocument createProcessingInstruction() Function

Last Updated : 03 Apr, 2023

The DOMDocument::createProcessingInstruction() function is an inbuilt function in PHP that is used to create a new instance of the class DOMProcessingInstruction.

Syntax:

DOMProcessingInstruction DOMDocument::createProcessingInstruction( $target, $data )

Parameters: This function accepts two parameters as mentioned above and described below:

$target: This parameter holds the target of the processing instruction.
$data: This parameter holds the content of the processing instruction.

Return Value: This function returns the new DOMProcessingInstruction on success or FALSE on failure.

Below examples illustrate the DOMDocument::createProcessingInstruction() function in PHP:

Example 1:

php

<?php 
  
// Create a new DOMDocument 
$domDocument = new DOMDocument('1.0', 'iso-8859-1'); 
  
// Use createProcessingInstruction() function to create 
// a new Processing Instruction node 
$domPI = $domDocument->createProcessingInstruction("name", "GeeksforGeeks"); 
  
// Append element to the document 
$domDocument->appendChild($domPI); 
  
// Create XML document and display it 
echo $domDocument->saveXML(); 
  
?> 

Output:

<?xml version="1.0" encoding="iso-8859-1"?>
<?name GeeksforGeeks?>

Example 2:

php

<?php 
  
// Create a new DOMDocument 
$domDocument = new DOMDocument('1.0', 'iso-8859-1'); 
  
// Use createProcessingInstruction() function to create 
// a new Processing Instruction node 
$domPI1 = $domDocument->createProcessingInstruction("name", 
                     "GeeksforGeeks"); 
$domPI2 = $domDocument->createProcessingInstruction("contact", 
                     "Noida"); 
$domPI3 = $domDocument->createProcessingInstruction("email", 
                     "[email protected]"); 
  
// Append element to the document 
$domDocument->appendChild($domPI1); 
$domDocument->appendChild($domPI2); 
$domDocument->appendChild($domPI3); 
  
// Create XML document and display it 
echo $domDocument->saveXML(); 
  
?> 

Output:

<?xml version="1.0" encoding="iso-8859-1"?>
<?name GeeksforGeeks?>
<?contact Noida?>
<?email [email protected]?>

Reference: https://www.php.net/manual/en/domdocument.createprocessinginstruction.php

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