WP List Table Bulk Delete Example

wp_list_table_bulk_delete_example.php

function admin_menu_add() {

	$hook_suffix = add_menu_page( 
		__( 'Bulk Deleter', 'bulk-delete-example' ),
		__( 'Bull Deleters', 'bulk-delete-example' ),
		'administrator',
		'bulk-delete-example',
		'bulk_delete_admin_page'
	);

	add_action( "load-{$hook_suffix}", 'admin_delete_action' );

}
add_action( 'admin_menu', 'admin_menu_add' );

function bulk_delete_admin_page() {

	if ( ! empty( $_REQUEST['_wp_http_referer'] ) ) {

		wp_redirect( remove_query_arg( array( '_wp_http_referer', '_wpnonce', 'action', 'action2', 'paged' ), wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
		exit;

	}

	if ( isset( $_GET['deleted'] ) && 'success' === $_GET['deleted'] ) {

		echo '<div class="notice notice-success is-dismissible"><p>' . __( 'Successfully deleted.', 'bulk-delete-example' ) . '</p></div>';

	}

	if ( isset( $_GET['deleted'] ) && 'error' === $_GET['deleted'] ) {

		echo '<div class="notice notice-error is-dismissible"><p>' . __( 'Error deleting.', 'bulk-delete-example' ) . '</p></div>';

	}

	$_SERVER['REQUEST_URI'] = remove_query_arg( array( 'updated', 'deleted', '_wpnonce', '_wp_http_referer' ), $_SERVER['REQUEST_URI'] );

	?>
	<form method="get">
	<input type="hidden" name="page" value="bulk-delete-example">
	<?php
	$list_table = new Bulk_Delete_Admin_List();
	$list_table->prepare_items();
	$list_table->display();
	?>
	</form>
	<?php

}

function admin_delete_action() {

	if ( isset( $_GET['_wpnonce'] ) && wp_verify_nonce( $_GET['_wpnonce'], 'bulk-' . sanitize_key( 'bulk-delete' ) ) ) {

		if ( ( isset( $_GET['action'] ) && 'bulk-delete' === $_GET['action'] ) ||
			 ( isset( $_GET['action2'] ) && 'bulk-delete' === $_GET['action2'] ) ) {

			if ( empty( $_GET['bulk-item-selection'] ) ) {

				return;

			}

			$delete_error = delete_the_things();

			$sendback = remove_query_arg( array( 'action', 'action2', '_wpnonce', '_wp_http_referer', 'bulk-item-selection', 'delete_id', 'updated' ), wp_get_referer() );

			if ( false === $delete_error ) {

				$sendback = add_query_arg( 'deleted', 'error', $sendback );

			} else {

				$sendback = add_query_arg( 'deleted', 'success', $sendback );

			}

			wp_redirect( $sendback );
			exit();

		}
	}
}

class Bulk_Delete_Admin_List extends WP_List_Table {

	public function __construct() {

		parent::__construct( array(
			'singular' => 'bulk-delete',
			'plural'   => 'bulk-deletes',
			'ajax'     => false
		) );

	}

	public function get_columns() {

		return array(
			'cb' => '<input type="checkbox" />',
		);

	}

	public function column_cb( $item ) {

		return sprintf( '<input type="checkbox" class="bulk-item-selection" name="bulk-item-selection[]" value="%s" />', $item['id'] );

	}

	public function get_bulk_actions() {

		return array(
			'bulk-delete' => __( 'Delete', 'bulk-delete-example' ),
		);

	}

	public function prepare_items() {

		$this->items[] = array(
				'id' => get_the_item_id(),
		);

	}
}