The DOMProcessingInstruction::__construct() function is an inbuilt function in PHP which is used a new read-only DOMProcessingInstruction object. To create a writable node, use DOMDocument::createProcessingInstruction.
Syntax:
public DOMProcessingInstruction::__construct( string $name, string $value )
Parameters: This function accept two parameters as mentioned above and described below:
- $name: It specifies the tag name of the processing instruction.
- $value: It specifies the value of the processing instruction.
Below given programs illustrate the DOMProcessingInstruction::__construct() function in PHP:
Program 1: Press Ctrl+U to see the DOM
php
<?php// Create a new DOMDocument instance$dom = new DOMDocument();// Create a html element$html = $dom->appendChild(new DOMElement('html'));// Create a body element$body = $html->appendChild(new DOMElement('body'));// Create a new DOMProcessingInstruction node$pinode = new DOMProcessingInstruction('php', 'echo "neveropen"; ');// Append the child$body->appendChild($pinode);// Render the XMLecho $dom->saveXML();?> |
Output:
Program 2: Press Ctrl+U to see the DOM element.
php
<?php// Create a new DOMDocument instance$dom = new DOMDocument();// Create a html element$html = $dom->appendChild(new DOMElement('html'));// Create a body element$body = $html->appendChild(new DOMElement('body'));// Create a new DOMProcessingInstruction node$pinode = new DOMProcessingInstruction('xml-stylesheet', 'type="text/xsl" href="base.xsl"');// Append the child$body->appendChild($pinode);// Render the XMLecho $dom->saveXML();?> |
Output:
Reference: https://www.php.net/manual/en/domprocessinginstruction.construct.php
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