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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 |
|---|---|
| 1255 | $comment_status = isset( $_REQUEST['comment_status'] ) ? $_REQUEST['comment_status'] : 'all'; |
| 1256 | |
| 1257 | /** This filter is documented in wp-admin/includes/class-wp-comments-list-table.php */ |
| 1258 | $per_page = apply_filters( 'comments_per_page', $per_page, $comment_status ); |
| 1259 | } elseif ( 'categories_per_page' === $option ) { |
| 1260 | /** This filter is documented in wp-admin/includes/class-wp-terms-list-table.php */ |
| 1261 | $per_page = apply_filters( 'edit_categories_per_page', $per_page ); |
| 1262 | } else { |
| 1263 | /** This filter is documented in wp-admin/includes/class-wp-list-table.php */ |
| 1264 | $per_page = apply_filters( "{$option}", $per_page ); |
| 1265 | } |
| 1266 | |
| 1267 | // Back compat. |
| 1268 | if ( isset( $this->post_type ) ) { |
| 1269 | /** This filter is documented in wp-admin/includes/post.php */ |
| 1270 | $per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type ); |
| 1271 | } |
| 1272 | |
| 1273 | // This needs a submit button. |