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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 |
|---|---|
| 149 | * @return int Amount of posts user has written. |
| 150 | */ |
| 151 | function count_user_posts($userid) { |
| 152 | global $wpdb; |
| 153 | |
| 154 | $where = get_posts_by_author_sql('post', TRUE, $userid); |
| 155 | |
| 156 | $count = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->posts $where" ); |
| 157 | |
| 158 | return apply_filters('get_usernumposts', $count, $userid); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Number of posts written by a list of users. |
| 163 | * |
| 164 | * @since 3.0.0 |
| 165 | * @param array $userid User ID number list. |
| 166 | * @return array Amount of posts each user has written. |
| 167 | */ |