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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 |
|---|---|
| 1216 | $per_page = apply_filters( 'edit_categories_per_page', $per_page ); |
| 1217 | } else { |
| 1218 | /** This filter is documented in wp-admin/includes/class-wp-list-table.php */ |
| 1219 | $per_page = apply_filters( "{$option}", $per_page ); |
| 1220 | } |
| 1221 | |
| 1222 | // Back compat |
| 1223 | if ( isset( $this->post_type ) ) { |
| 1224 | /** This filter is documented in wp-admin/includes/post.php */ |
| 1225 | $per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type ); |
| 1226 | } |
| 1227 | |
| 1228 | // This needs a submit button |
| 1229 | add_filter( 'screen_options_show_submit', '__return_true' ); |
| 1230 | |
| 1231 | ?> |
| 1232 | <fieldset class="screen-options"> |
| 1233 | <legend><?php _e( 'Pagination' ); ?></legend> |
| 1234 | <?php if ( $per_page_label ) : ?> |