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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 |
|---|---|
| 149 | $year = (int) get_query_var('year'); |
| 150 | $monthnum = (int) get_query_var('monthnum'); |
| 151 | $day = (int) get_query_var('day'); |
| 152 | $title = ''; |
| 153 | |
| 154 | // If there's a category |
| 155 | if ( !empty($cat) ) { |
| 156 | // category exclusion |
| 157 | if ( !stristr($cat,'-') ) |
| 158 | $title = apply_filters('single_cat_title', get_the_category_by_ID($cat)); |
| 159 | } elseif ( !empty($category_name) ) { |
| 160 | if ( stristr($category_name,'/') ) { |
| 161 | $category_name = explode('/',$category_name); |
| 162 | if ( $category_name[count($category_name)-1] ) |
| 163 | $category_name = $category_name[count($category_name)-1]; // no trailing slash |
| 164 | else |
| 165 | $category_name = $category_name[count($category_name)-2]; // there was a trailling slash |
| 166 | } |
| 167 | $title = $wpdb->get_var("SELECT cat_name FROM $wpdb->categories WHERE category_nicename = '$category_name'"); |
| 168 | $title = apply_filters('single_cat_title', $title); |
| 169 | } |
| 170 | |
| 171 | // If there's an author |
| 172 | if ( !empty($author) ) { |
| 173 | $title = get_userdata($author); |
| 174 | $title = $title->display_name; |
| 175 | } |
| 176 | if ( !empty($author_name) ) { |
| 177 | // We do a direct query here because we don't cache by nicename. |