wp_rel_nofollow() │ WP 1.5.0

Adds rel nofollow string to all HTML A elements in content.

No Hooks.

Return

String. Converted content.

Usage

wp_rel_nofollow( $text );
$text(string) (required)
Content that may contain HTML A elements.

Changelog

Since 1.5.0 Introduced.

Code of wp_rel_nofollow() WP 5.9.3

wp-includes/formatting.php 
function wp_rel_nofollow( $text ) {
	// This is a pre-save filter, so text is already escaped.
	$text = stripslashes( $text );
	$text = preg_replace_callback(
		'|<a (.+?)>|i',
		static function( $matches ) {
			return wp_rel_callback( $matches, 'nofollow' );
		},
		$text
	);
	return wp_slash( $text );
}

sanitize_

Formatting