From 070b0f4017859c5b5dd7fd3a02631246136c0ceb Mon Sep 17 00:00:00 2001
From: Nikita Sinelnikov <nsinelnikov.work@gmail.com>
Date: Wed, 22 Sep 2021 11:18:50 +0300
Subject: [PATCH] - fixed sanitizing in the places where '' (empty string) is a
 valid value with Int or AbsInt values

---
 includes/admin/class-admin.php | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/includes/admin/class-admin.php b/includes/admin/class-admin.php
index 1d5ce2a2..d503b5cf 100644
--- a/includes/admin/class-admin.php
+++ b/includes/admin/class-admin.php
@@ -767,10 +767,10 @@ if ( ! class_exists( 'um\admin\Admin' ) ) {
 						'sanitize' => 'absint',
 					),
 					'_min'                            => array(
-						'sanitize' => 'absint',
+						'sanitize' => 'empty_int',
 					),
 					'_max'                            => array(
-						'sanitize' => 'absint',
+						'sanitize' => 'empty_int',
 					),
 					'_min_chars'                      => array(
 						'sanitize' => 'absint',
@@ -1360,6 +1360,9 @@ if ( ! class_exists( 'um\admin\Admin' ) ) {
 					case 'int':
 						$sanitized[ $k ] = (int) $v;
 						break;
+					case 'empty_int':
+						$sanitized[ $k ] = ( '' !== $v ) ? (int) $v : '';
+						break;
 					case 'bool':
 						$sanitized[ $k ] = (bool) $v;
 						break;
@@ -1393,6 +1396,13 @@ if ( ! class_exists( 'um\admin\Admin' ) ) {
 							$sanitized[ $k ] = absint( $v );
 						}
 						break;
+					case 'empty_absint':
+						if ( is_array( $v ) ) {
+							$sanitized[ $k ] = array_map( 'absint', $v );
+						} else {
+							$sanitized[ $k ] = ( '' !== $v ) ? absint( $v ) : '';
+						}
+						break;
 				}
 			}