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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 |
|---|---|
| 107 | if ( is_wp_error( $category ) ) |
| 108 | return $category; |
| 109 | return $category->name; |
| 110 | } |
| 111 | |
| 112 | function get_the_category_list($separator = '', $parents='') { |
| 113 | global $wp_rewrite; |
| 114 | $categories = get_the_category(); |
| 115 | if (empty($categories)) |
| 116 | return apply_filters('the_category', __('Uncategorized'), $separator, $parents); |
| 117 | |
| 118 | $rel = ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) ? 'rel="category tag"' : 'rel="category"'; |
| 119 | |
| 120 | $thelist = ''; |
| 121 | if ( '' == $separator ) { |
| 122 | $thelist .= '<ul class="post-categories">'; |
| 123 | foreach ( $categories as $category ) { |
| 124 | $thelist .= "\n\t<li>"; |
| 125 | switch ( strtolower($parents) ) { |
| Line | Code |
| 158 | $thelist .= "$category->cat_name</a>"; |
| 159 | break; |
| 160 | case '': |
| 161 | default: |
| 162 | $thelist .= '<a href="' . get_category_link($category->term_id) . '" title="' . sprintf(__("View all posts in %s"), $category->name) . '" ' . $rel . '>' . $category->name.'</a>'; |
| 163 | } |
| 164 | ++$i; |
| 165 | } |
| 166 | } |
| 167 | return apply_filters('the_category', $thelist, $separator, $parents); |
| 168 | } |
| 169 | |
| 170 | function in_category( $category ) { // Check if the current post is in the given category |
| 171 | global $post, $blog_id; |
| 172 | |
| 173 | $categories = get_object_term_cache($post->ID, 'category'); |
| 174 | if ( false === $categories ) |
| 175 | $categories = wp_get_object_terms($post->ID, 'category'); |
| 176 | if(array_key_exists($category, $categories)) |