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function is not described

clean_pre() WP 1.2.0

Deprecated from version 3.4.0. It is no longer supported and can be removed in future releases. It is recommended to replace this function with the same one.

Accepts matches array from preg_replace_callback in wpautop() or a string.

Ensures that the contents of a <pre>...</pre> HTML block are not converted into paragraphs or line breaks.

No Hooks.

Return

String. The pre block without paragraph/line break conversion.

Usage

clean_pre( $matches );
$matches(array|string) (required)
The array or string

Changelog

Since 1.2.0 Introduced.
Deprecated 3.4.0

Code of clean_pre() WP 5.7.1

<?php
function clean_pre($matches) {
	_deprecated_function( __FUNCTION__, '3.4.0' );

	if ( is_array($matches) )
		$text = $matches[1] . $matches[2] . "</pre>";
	else
		$text = $matches;

	$text = str_replace(array('<br />', '<br/>', '<br>'), array('', '', ''), $text);
	$text = str_replace('<p>', "\n", $text);
	$text = str_replace('</p>', '', $text);

	return $text;
}