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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 |
|---|---|
| 1166 | $per_page = apply_filters( 'edit_categories_per_page', $per_page ); |
| 1167 | } else { |
| 1168 | /** This filter is documented in wp-admin/includes/class-wp-list-table.php */ |
| 1169 | $per_page = apply_filters( "{$option}", $per_page ); |
| 1170 | } |
| 1171 | |
| 1172 | // Back compat |
| 1173 | if ( isset( $this->post_type ) ) { |
| 1174 | /** This filter is documented in wp-admin/includes/post.php */ |
| 1175 | $per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type ); |
| 1176 | } |
| 1177 | |
| 1178 | // This needs a submit button |
| 1179 | add_filter( 'screen_options_show_submit', '__return_true' ); |
| 1180 | |
| 1181 | ?> |
| 1182 | <fieldset class="screen-options"> |
| 1183 | <legend><?php _e( 'Pagination' ); ?></legend> |
| 1184 | <?php if ( $per_page_label ) : ?> |