wp-admin/includes/class-wp-screen.php:1233Renders the items per page option.
4 hooks fire while WP_Screen::render_per_page_options() runs, in this order:
Filters the number of comments listed per page in the comments list table.
Filters the number of terms displayed per page for the Categories list table.
Filters the number of items to be displayed on each page of the list table.
Filters the number of posts displayed per page when specifically listing "posts".
public function render_per_page_options() { if ( null === $this->get_option( 'per_page' ) ) { return; } $per_page_label = $this->get_option( 'per_page', 'label' ); if ( null === $per_page_label ) { $per_page_label = __( 'Number of items per page:' ); } $option = $this->get_option( 'per_page', 'option' ); if ( ! $option ) { $option = str_replace( '-', '_', "{$this->id}_per_page" ); } $per_page = (int) get_user_option( $option ); if ( empty( $per_page ) || $per_page < 1 ) { $per_page = $this->get_option( 'per_page', 'default' ); if ( ! $per_page ) { $per_page = 20; } } if ( 'edit_comments_per_page' === $option ) { $comment_status = isset( $_REQUEST['comment_status'] ) ? $_REQUEST['comment_status'] : 'all'; /** This filter is documented in wp-admin/includes/class-wp-comments-list-table.php */ $per_page = apply_filters( 'comments_per_page', $per_page, $comment_status ); } elseif ( 'categories_per_page' === $option ) { /** This filter is documented in wp-admin/includes/class-wp-terms-list-table.php */ $per_page = apply_filters( 'edit_categories_per_page', $per_page ); } else { /** This filter is documented in wp-admin/includes/class-wp-list-table.php */ $per_page = apply_filters( "{$option}", $per_page ); } // Back compat. if ( isset( $this->post_type ) ) { /** This filter is documented in wp-admin/includes/post.php */ $per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type ); } // This needs a submit button. add_filter( 'screen_options_show_submit', '__return_true' ); ?> <fieldset class="screen-options"> <legend><?php _e( 'Pagination' ); ?></legend> <?php if ( $per_page_label ) : ?> <label for="<?php echo esc_attr( $option ); ?>"><?php echo $per_page_label; ?></label> <input type="number" step="1" min="1" max="999" class="screen-per-page" name="wp_screen_options[value]" id="<?php echo esc_attr( $option ); ?>" value="<?php echo esc_attr( $per_page ); ?>" /> <?php endif; ?> <input type="hidden" name="wp_screen_options[option]" value="<?php echo esc_attr( $option ); ?>" /> </fieldset> <?php }Introduced in 3.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-screen.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.