diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index b91dbe00811..a0dbe0df5bd 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -268,11 +268,11 @@ class Commande extends CommonOrder
 
 
 	/**
-	 * @var string key of module source when order generated from a dedicated module ('cashdesk', 'takepos', ...)
+	 * @var ?string 			key of module source when order generated from a dedicated module ('cashdesk', 'takepos', ...)
 	 */
 	public $module_source;
 	/**
-	 * @var string key of pos source ('0', '1', ...)
+	 * @var ?string 			key of pos source ('0', '1', ...)
 	 */
 	public $pos_source;
 
diff --git a/htdocs/commande/list_det.php b/htdocs/commande/list_det.php
index 67bcfa869c5..e472225409a 100644
--- a/htdocs/commande/list_det.php
+++ b/htdocs/commande/list_det.php
@@ -322,7 +322,7 @@ if (empty($reshook)) {
 		$search_billed = '';
 		$toselect = array();
 		$search_array_options = array();
-		$search_categ_cus = 0;
+		$search_categ_cus = '';
 		$search_datecloture_start = '';
 		$search_datecloture_end = '';
 		$search_fk_cond_reglement = '';
@@ -596,7 +596,7 @@ if ($search_sale && $search_sale != '-1') {
 }
 // Search for tag/category ($searchCategoryCustomerList is an array of ID)
 $searchCategoryCustomerOperator = -1;
-$searchCategoryCustomerList = array($search_categ_cus);
+$searchCategoryCustomerList = ($search_categ_cus !== '-1' ? explode(',', $search_categ_cus) : array());
 if (!empty($searchCategoryCustomerList)) {
 	$searchCategoryCustomerSqlList = array();
 	$listofcategoryid = '';
diff --git a/htdocs/core/ajax/saveinplace.php b/htdocs/core/ajax/saveinplace.php
index dfd2eb6fbb0..178780f9f5b 100644
--- a/htdocs/core/ajax/saveinplace.php
+++ b/htdocs/core/ajax/saveinplace.php
@@ -194,51 +194,6 @@ if (!empty($field) && !empty($element) && !empty($table_element) && !empty($fk_e
 			$timestamp = GETPOSTINT('timestamp', 2);
 			$format = 'date';
 			$newvalue = ($timestamp / 1000);
-		} elseif ($type == 'select') {
-			$loadmethodname = 'load_cache_'.$loadmethod;
-			$loadcachename = 'cache_'.$loadmethod;
-			$loadviewname = 'view_'.$loadmethod;
-
-			$form = new Form($db);
-			if (method_exists($form, $loadmethodname)) {
-				$ret = $form->$loadmethodname();
-				if ($ret > 0) {
-					$loadcache = $form->$loadcachename;
-					$value = $loadcache[$newvalue];
-
-					if (!empty($form->$loadviewname)) {
-						$loadview = $form->$loadviewname;
-						$view = $loadview[$newvalue];
-					}
-				} else {
-					$error++;
-					$return['error'] = $form->error;
-				}
-			} else {
-				$module = $subelement = $ext_element;
-				if (preg_match('/^([^_]+)_([^_]+)/i', $ext_element, $regs)) {
-					$module = $regs[1];
-					$subelement = $regs[2];
-				}
-
-				dol_include_once('/'.$module.'/class/actions_'.$subelement.'.class.php');
-				$classname = 'Actions'.ucfirst($subelement);
-				$object = new $classname($db);
-				'@phan-var-force CommonHookActions $object';
-				$ret = $object->$loadmethodname();
-				if ($ret > 0) {
-					$loadcache = $object->$loadcachename;
-					$value = $loadcache[$newvalue];
-
-					if (!empty($object->$loadviewname)) {
-						$loadview = $object->$loadviewname;
-						$view = $loadview[$newvalue];
-					}
-				} else {
-					$error++;
-					$return['error'] = $object->error;
-				}
-			}
 		}
 
 		if (!$error) {
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 0f821b14bb3..95793b6fced 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3797,7 +3797,7 @@ class Form
 	 * Return list of products for customer (in Ajax if Ajax activated or go to select_produits_fournisseurs_list)
 	 *
 	 * @param 	int 		$socid 							Id third party
-	 * @param 	string 		$selected 						Preselected product
+	 * @param 	string|int	$selected 						Preselected product
 	 * @param 	string 		$htmlname 						Name of HTML Select
 	 * @param 	string 		$filtertype 					Filter on product type (''=nofilter, 0=product, 1=service)
 	 * @param 	string 		$filtre 						For a SQL filter
@@ -3807,7 +3807,7 @@ class Form
 	 * @param 	string 		$morecss 						More CSS
 	 * @param 	string 		$placeholder 					Placeholder
 	 * @param	int			$nooutput						1=do not output but return string instead
-	 * @return  void
+	 * @return  string|void									HTML select or nothing
 	 */
 	public function select_produits_fournisseurs($socid, $selected = '', $htmlname = 'productid', $filtertype = '', $filtre = '', $ajaxoptions = array(), $hidelabel = 0, $alsoproductwithnosupplierprice = 0, $morecss = '', $placeholder = '', $nooutput = 0)
 	{
@@ -3821,7 +3821,7 @@ class Form
 
 		$selected_input_value = '';
 		if (!empty($conf->use_javascript_ajax) && getDolGlobalString('PRODUIT_USE_SEARCH_TO_SELECT')) {
-			if ($selected > 0) {
+			if ((int) $selected > 0) {
 				require_once DOL_DOCUMENT_ROOT . '/product/class/product.class.php';
 				$producttmpselect = new Product($this->db);
 				$producttmpselect->fetch((int) $selected);
diff --git a/htdocs/core/lib/ajax.lib.php b/htdocs/core/lib/ajax.lib.php
index e02b87a418c..747c4866050 100644
--- a/htdocs/core/lib/ajax.lib.php
+++ b/htdocs/core/lib/ajax.lib.php
@@ -31,7 +31,7 @@
  * The HTML field must be an input text with id=search_$htmlname.
  * This use the jQuery "autocomplete" function. If we want to use the select2, we must instead use input select into functions that call this method.
  *
- * @param string		$selected 			Preselected value
+ * @param string|int	$selected 			Preselected value
  * @param string|int	$htmlname 			HTML name of input field
  * @param string		$url 				Ajax Url to call for request: /path/page.php. Must return a json array ('key'=>id, 'value'=>String shown into input field once selected, 'label'=>String shown into combo list)
  * @param string		$urloption			More parameters on URL request