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_make_clickable_rel_attr › WordPress Function
Since6.2.0
已弃用n/a
› _make_clickable_rel_attr ( $url )
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Helper function used to build the "rel" attribute for a URL when creating an anchor using make_clickable().
Related Functions: make_clickable, _make_url_clickable_cb, _make_email_clickable_cb, wp_make_link_relative, _make_web_ftp_clickable_cb
源码
function _make_clickable_rel_attr( $url ) { $rel_parts = array(); $scheme = strtolower( wp_parse_url( $url, PHP_URL_SCHEME ) ); $nofollow_schemes = array_intersect( wp_allowed_protocols(), array( 'https', 'http' ) ); // Apply "nofollow" to external links with qualifying URL schemes (mailto:, tel:, etc... shouldn't be followed). if ( ! wp_is_internal_link( $url ) && in_array( $scheme, $nofollow_schemes, true ) ) { $rel_parts[] = 'nofollow'; } // Apply "ugc" when in comment context. if ( 'comment_text' === current_filter() ) { $rel_parts[] = 'ugc'; } $rel = implode( ' ', $rel_parts ); /** * Filters the rel value that is added to URL matches converted to links. * * @since 5.3.0 * * @param string $rel The rel value. * @param string $url The matched URL being converted to a link tag. */ $rel = apply_filters( 'make_clickable_rel', $rel, $url ); $rel_attr = $rel ? ' rel="' . esc_attr( $rel ) . '"' : ''; return $rel_attr; }