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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 2922 | |
| 2923 | /** |
| 2924 | * Filters the rel value that is added to URL matches converted to links. |
| 2925 | * |
| 2926 | * @since 5.3.0 |
| 2927 | * |
| 2928 | * @param string $rel The rel value. |
| 2929 | * @param string $url The matched URL being converted to a link tag. |
| 2930 | */ |
| 2931 | $rel = apply_filters( 'make_clickable_rel', $rel, $url ); |
| 2932 | $rel = esc_attr( $rel ); |
| 2933 | |
| 2934 | return $matches[1] . "<a href=\"$url\" rel=\"$rel\">$url</a>" . $suffix; |
| 2935 | } |
| 2936 | |
| 2937 | /** |
| 2938 | * Callback to convert URL match to HTML A element. |
| 2939 | * |
| 2940 | * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable(). |
| Line | Code |
| 2963 | } |
| 2964 | |
| 2965 | if ( 'comment_text' === current_filter() ) { |
| 2966 | $rel = 'nofollow ugc'; |
| 2967 | } else { |
| 2968 | $rel = 'nofollow'; |
| 2969 | } |
| 2970 | |
| 2971 | /** This filter is documented in wp-includes/formatting.php */ |
| 2972 | $rel = apply_filters( 'make_clickable_rel', $rel, $dest ); |
| 2973 | $rel = esc_attr( $rel ); |
| 2974 | |
| 2975 | return $matches[1] . "<a href=\"$dest\" rel=\"$rel\">$dest</a>$ret"; |
| 2976 | } |
| 2977 | |
| 2978 | /** |
| 2979 | * Callback to convert email address match to HTML A element. |
| 2980 | * |
| 2981 | * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable(). |