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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.
| Line | Code |
|---|---|
| 156 | * @return int Amount of posts user has written. |
| 157 | */ |
| 158 | function count_user_posts($userid) { |
| 159 | global $wpdb; |
| 160 | |
| 161 | $where = get_posts_by_author_sql('post', true, $userid); |
| 162 | |
| 163 | $count = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->posts $where" ); |
| 164 | |
| 165 | return apply_filters('get_usernumposts', $count, $userid); |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Number of posts written by a list of users. |
| 170 | * |
| 171 | * @since 3.0.0 |
| 172 | * |
| 173 | * @param array $users Array of user IDs. |
| 174 | * @param string $post_type Optional. Post type to check. Defaults to post. |