Prep Plugin for release on WordPress.org

Escape everything that should be escaped.
Add nonce checks where needed.
Sanitize all inputs.
Apply Code style changes across the codebase.
Correct many deprecation notices.
Optimize load order of many filters.

inc/list-tables/class-payment-list-table.php

@@ -57,14 +57,9 @@ class Payment_List_Table extends Base_List_Table {
 	 */
 	public function get_extra_query_fields() {
 
-		$_filter_fields = parent::get_extra_query_fields();
-
-		$search = isset($_GET['s']) ? sanitize_text_field($_GET['s']) : false;
-
+		$_filter_fields                  = parent::get_extra_query_fields();
 		$_filter_fields['membership_id'] = wu_request('membership_id', false);
-
-		$_filter_fields['customer_id'] = wu_request('customer_id', false);
-
+		$_filter_fields['customer_id']   = wu_request('customer_id', false);
 		$_filter_fields['parent_id__in'] = ['0', 0, '', null];
 
 		return $_filter_fields;
@@ -75,7 +70,7 @@ class Payment_List_Table extends Base_List_Table {
 	 *
 	 * @since 2.0.0
 	 *
-	 * @param WP_Ultimo\Models\Payment $item Payment object.
+	 * @param \WP_Ultimo\Models\Payment $item Payment object.
 	 * @return string
 	 */
 	public function column_hash($item) {
@@ -129,7 +124,7 @@ class Payment_List_Table extends Base_List_Table {
 	 *
 	 * @since 2.0.0
 	 *
-	 * @param WP_Ultimo\Models\Payment $item Payment object.
+	 * @param \WP_Ultimo\Models\Payment $item Payment object.
 	 * @return string
 	 */
 	public function column_product($item) {
@@ -158,7 +153,7 @@ class Payment_List_Table extends Base_List_Table {
 	 *
 	 * @since 2.0.0
 	 *
-	 * @param WP_Ultimo\Models\Payment $item Payment object.
+	 * @param \WP_Ultimo\Models\Payment $item Payment object.
 	 * @return string
 	 */
 	public function column_total($item) {