PHP | DOMDocument loadHTML() Function

Last Updated : 30 Aug, 2019

The DOMDocument::loadHTML() function is an inbuilt function in PHP which is used to load HTML file from a string.

Syntax:

bool DOMDocument::loadHTML( string $source, int $options = 0 )

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

$source: This parameter holds the HTML string.
$options: This parameter is used to specify the additional Libxml parameters in PHP 5.4.0 and Libxml 2.6.0.

Return Value: This function returns TRUE on success or FALSE on failure. This function returns a DOMDocument if it is called statically or FALSE on failure.

Errors/Exceptions: If empty string is passed as parameter then it generates an warning message. This function can also be called statically but it will issue an E_STRICT error.

Below program illustrates the DOMDocument::loadHTML() function in PHP:

Program 1:

<?php
  
// Create a new DOMDocument
$doc = new DOMDocument();
  
// Load the HTML file
$doc->loadHTML(
"<html>
<head>
    <title>
        DOMDocument::loadHTML() function
    </title>
</head>
<body>
    <h1>GeeksforGeeks</h1>
    <h2>DOMDocument::loadHTML() function</h2>
</body>    
</html>");
  
// Creates an HTML document and display it
echo $doc->saveHTML();
  
?>

Output:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
        "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
    <title>
        DOMDocument::loadHTML() function
    </title>
</head>
<body>
    <h1>GeeksforGeeks</h1>
    <h2>DOMDocument::loadHTML() function</h2>
</body>
</html>

Program 2:

<?php
  
// Create a new DOMDocument
$doc = new DOMDocument();
   
// Create an element
$comm1 = $doc->createComment('Starting of HTML document file');
  
// Append element to the document
$doc->appendChild($comm1);
  
// Creates an HTML document and display it
echo $doc->saveHTML();
  
// Load the HTML element to the document
$doc->loadHTML(
"<html>
<head>
    <title>PHP function</title>
</head>
<body>
    <h1>Welcome to GeeksforGeeks</h1>
    <h2>PHP function</h2>
    <div>A computer science portal</div>
</body>    
</html>");
  
// Create an element
$comm2 = $doc->createComment('Ending of HTML document file');
  
// Append element to the document
$doc->appendChild($comm2);
  
// Creates an HTML document and display it
echo $doc->saveHTML();
  
?>

Output:

<!--Starting of HTML document file-->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" 
        "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
    <title>PHP function</title>
</head>
<body>
    <h1>Welcome to GeeksforGeeks</h1>
    <h2>PHP function</h2>
    <div>A computer science portal</div>
</body>
</html>
<!--Ending of HTML document file-->

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

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