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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 |
|---|---|
| 2903 | |
| 2904 | /** |
| 2905 | * Filters the rel value that is added to URL matches converted to links. |
| 2906 | * |
| 2907 | * @since 5.3.0 |
| 2908 | * |
| 2909 | * @param string $rel The rel value. |
| 2910 | * @param string $url The matched URL being converted to a link tag. |
| 2911 | */ |
| 2912 | $rel = apply_filters( 'make_clickable_rel', $rel, $url ); |
| 2913 | $rel = esc_attr( $rel ); |
| 2914 | |
| 2915 | return $matches[1] . "<a href=\"$url\" rel=\"$rel\">$url</a>" . $suffix; |
| 2916 | } |
| 2917 | |
| 2918 | /** |
| 2919 | * Callback to convert URL match to HTML A element. |
| 2920 | * |
| 2921 | * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable(). |
| Line | Code |
| 2944 | } |
| 2945 | |
| 2946 | if ( 'comment_text' === current_filter() ) { |
| 2947 | $rel = 'nofollow ugc'; |
| 2948 | } else { |
| 2949 | $rel = 'nofollow'; |
| 2950 | } |
| 2951 | |
| 2952 | /** This filter is documented in wp-includes/formatting.php */ |
| 2953 | $rel = apply_filters( 'make_clickable_rel', $rel, $dest ); |
| 2954 | $rel = esc_attr( $rel ); |
| 2955 | |
| 2956 | return $matches[1] . "<a href=\"$dest\" rel=\"$rel\">$dest</a>$ret"; |
| 2957 | } |
| 2958 | |
| 2959 | /** |
| 2960 | * Callback to convert email address match to HTML A element. |
| 2961 | * |
| 2962 | * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable(). |