wpautop( string $text, bool $br = true ): string

446function wpautop( $text, $br = true ) {447	$pre_tags = array();448 449	if ( trim( $text ) === '' ) {450		return '';451	}452 453	// Just to make things a little easier, pad the end.454	$text = $text . "\n";455 456	/*457	 * Pre tags shouldn't be touched by autop.458	 * Replace pre tags with placeholders and bring them back after autop.459	 */460	if ( str_contains( $text, '<pre' ) ) {461		$text_parts = explode( '</pre>', $text );462		$last_part  = array_pop( $text_parts );463		$text       = '';464		$i          = 0;465 466		foreach ( $text_parts as $text_part ) {467			$start = strpos( $text_part, '<pre' );468 469			// Malformed HTML?470			if ( false === $start ) {471				$text .= $text_part;472				continue;473			}474 475			$name              = "<pre wp-pre-tag-$i></pre>";476			$pre_tags[ $name ] = substr( $text_part, $start ) . '</pre>';477 478			$text .= substr( $text_part, 0, $start ) . $name;479			++$i;480		}481 482		$text .= $last_part;483	}484	// Change multiple <br>'s into two line breaks, which will turn into paragraphs.485	$text = preg_replace( '|<br\s*/?>\s*<br\s*/?>|', "\n\n", $text );486 487	$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';488 489	// Add a double line break above block-level opening tags.490	$text = preg_replace( '!(<' . $allblocks . '[\s/>])!', "\n\n$1", $text );491 492	// Add a double line break below block-level closing tags.493	$text = preg_replace( '!(</' . $allblocks . '>)!', "$1\n\n", $text );494 495	// Add a double line break after hr tags, which are self closing.496	$text = preg_replace( '!(<hr\s*?/?>)!', "$1\n\n", $text );497 498	// Standardize newline characters to "\n".499	$text = str_replace( array( "\r\n", "\r" ), "\n", $text );500 501	// Find newlines in all elements and add placeholders.502	$text = wp_replace_in_html_tags( $text, array( "\n" => ' <!-- wpnl --> ' ) );503 504	// Collapse line breaks before and after <option> elements so they don't get autop'd.505	if ( str_contains( $text, '<option' ) ) {506		$text = preg_replace( '|\s*<option|', '<option', $text );507		$text = preg_replace( '|</option>\s*|', '</option>', $text );508	}509 510	/*511	 * Collapse line breaks inside <object> elements, before <param> and <embed> elements512	 * so they don't get autop'd.513	 */514	if ( str_contains( $text, '</object>' ) ) {515		$text = preg_replace( '|(<object[^>]*>)\s*|', '$1', $text );516		$text = preg_replace( '|\s*</object>|', '</object>', $text );517		$text = preg_replace( '%\s*(</?(?:param|embed)[^>]*>)\s*%', '$1', $text );518	}519 520	/*521	 * Collapse line breaks inside <audio> and <video> elements,522	 * before and after <source> and <track> elements.523	 */524	if ( str_contains( $text, '<source' ) || str_contains( $text, '<track' ) ) {525		$text = preg_replace( '%([<\[](?:audio|video)[^>\]]*[>\]])\s*%', '$1', $text );