WordPress at a glance

wp_targeted_link_rel() WP 1.0

Adds rel noreferrer and noopener to all HTML A elements that have a target.

✈ 1 time = 0.000249s = fast | 50000 times = 0.22s = very fast | PHP 7.2.16, WP 5.2

No Hooks.

Return

String. Converted content.

Usage

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

Changelog

Since 5.1.0 Introduced.

Code of wp targeted link rel: wp-includes/formatting.php WP 5.4.2

<?php
function wp_targeted_link_rel( $text ) {
	// Don't run (more expensive) regex if no links with targets.
	if ( stripos( $text, 'target' ) === false || stripos( $text, '<a ' ) === false || is_serialized( $text ) ) {
		return $text;
	}

	$script_and_style_regex = '/<(script|style).*?<\/\\1>/si';

	preg_match_all( $script_and_style_regex, $text, $matches );
	$extra_parts = $matches[0];
	$html_parts  = preg_split( $script_and_style_regex, $text );

	foreach ( $html_parts as &$part ) {
		$part = preg_replace_callback( '|<a\s([^>]*target\s*=[^>]*)>|i', 'wp_targeted_link_rel_callback', $part );
	}

	$text = '';
	for ( $i = 0; $i < count( $html_parts ); $i++ ) {
		$text .= $html_parts[ $i ];
		if ( isset( $extra_parts[ $i ] ) ) {
			$text .= $extra_parts[ $i ];
		}
	}

	return $text;
}

Related Functions

From tag: Link (tag A in HTML)

More from category: Sanitizing, Escaping

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