get_html_split_regex(): string

626function get_html_split_regex() {627	static $regex;628 629	if ( ! isset( $regex ) ) {630		// phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation631		$comments =632			'!'             // Start of comment, after the <.633			. '(?:'         // Unroll the loop: Consume everything until --> is found.634			.     '-(?!->)' // Dash not followed by end of comment.635			.     '[^\-]*+' // Consume non-dashes.636			. ')*+'         // Loop possessively.637			. '(?:-->)?';   // End of comment. If not found, match all input.638 639		$cdata =640			'!\[CDATA\['    // Start of comment, after the <.641			. '[^\]]*+'     // Consume non-].642			. '(?:'         // Unroll the loop: Consume everything until ]]> is found.643			.     '](?!]>)' // One ] not followed by end of comment.644			.     '[^\]]*+' // Consume non-].645			. ')*+'         // Loop possessively.646			. '(?:]]>)?';   // End of comment. If not found, match all input.647 648		$escaped =649			'(?='             // Is the element escaped?650			.    '!--'651			. '|'652			.    '!\[CDATA\['653			. ')'654			. '(?(?=!-)'      // If yes, which type?655			.     $comments656			. '|'657			.     $cdata658			. ')';659 660		$regex =661			'/('                // Capture the entire match.662			.     '<'           // Find start of element.663			.     '(?'          // Conditional expression follows.664			.         $escaped  // Find end of escaped element.665			.     '|'           // ...else...666			.         '[^>]*>?' // Find end of normal element.667			.     ')'668			. ')/';669		// phpcs:enable670	}671 672	return $regex;673}