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Tidy (class) is a feature in PHP that allows you to clean up and transform HTML documents. It is used to parse HTML code and generate well-formed and valid HTML output.

Here is an example of how to use the tidy (class) in PHP:

php
// Create a new Tidy object
$tidy = new tidy();

// Specify the input HTML code
$html = '<p>Hello, <b>world!</p>';

// Clean up the HTML code
$tidy->parseString($html, array('show-body-only' => true), 'utf8');
$tidy->cleanRepair();

// Output the tidied HTML code
echo $tidy;


In the above example, we first create a new Tidy object using the new tidy() constructor. Then, we specify the input HTML code as a string in the variable $html.

Next, we use the parseString() method of the Tidy object to parse the input HTML code. The second parameter in parseString() is an array of configuration options, where we use 'show-body-only' => true to only show the body of the HTML code. The third parameter specifies the input encoding, which is set to UTF-8 in this case.

After parsing the HTML code, we call the cleanRepair() method on the Tidy object to clean up and repair the HTML code.

Finally, we output the tidied HTML code using echo $tidy;.

Note that you will need to have the Tidy extension enabled in your PHP installation in order to use the Tidy class.