diff --git a/htdocs/bom/tpl/objectline_view.tpl.php b/htdocs/bom/tpl/objectline_view.tpl.php
index 835da0a80d8..98e79fa0416 100644
--- a/htdocs/bom/tpl/objectline_view.tpl.php
+++ b/htdocs/bom/tpl/objectline_view.tpl.php
@@ -34,6 +34,8 @@
  * $type, $text, $description, $line
  */
 
+/** var ObjectLine $line */
+
 require_once DOL_DOCUMENT_ROOT.'/workstation/class/workstation.class.php';
 
 // Protection to avoid direct call of template
diff --git a/htdocs/compta/facture/class/facture-rec.class.php b/htdocs/compta/facture/class/facture-rec.class.php
index 5c24359c78b..09b2c1e6185 100644
--- a/htdocs/compta/facture/class/facture-rec.class.php
+++ b/htdocs/compta/facture/class/facture-rec.class.php
@@ -1035,6 +1035,10 @@ class FactureRec extends CommonInvoice
 				$this->error = $this->db->lasterror();
 				return -1;
 			}
+		} else {
+			$this->error = 'Recurring Invoice is suspended. adding lines not allowed.';
+
+			return -1;
 		}
 	}
 
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index ba6f35363b6..5e4f5490e61 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -802,18 +802,17 @@ class Form
 	/**
 	 * Generate select HTML to choose massaction
 	 *
-	 * @param string $selected Value auto selected when at least one record is selected. Not a preselected value. Use '0' by default.
-	 * @param array $arrayofaction array('code'=>'label', ...). The code is the key stored into the GETPOST('massaction') when submitting action.
-	 * @param int $alwaysvisible 1=select button always visible
-	 * @param string $name Name for massaction
-	 * @param string $cssclass CSS class used to check for select
-	 * @return    string|void                Select list
+	 * @param string 	$selected 		Value auto selected when at least one record is selected. Not a preselected value. Use '0' by default.
+	 * @param array 	$arrayofaction 	array('code'=>'label', ...). The code is the key stored into the GETPOST('massaction') when submitting action.
+	 * @param int 		$alwaysvisible 	1=select button always visible
+	 * @param string 	$name 			Name for massaction
+	 * @param string 	$cssclass 		CSS class used to check for select
+	 * @return string|void              Select list
 	 */
 	public function selectMassAction($selected, $arrayofaction, $alwaysvisible = 0, $name = 'massaction', $cssclass = 'checkforselect')
 	{
 		global $conf, $langs, $hookmanager;
 
-
 		$disabled = 0;
 		$ret = '<div class="centpercent center">';
 		$ret .= '<select class="flat' . (empty($conf->use_javascript_ajax) ? '' : ' hideobject') . ' ' . $name . ' ' . $name . 'select valignmiddle alignstart" id="' . $name . '" name="' . $name . '"' . ($disabled ? ' disabled="disabled"' : '') . '>';
diff --git a/htdocs/core/class/html.formother.class.php b/htdocs/core/class/html.formother.class.php
index cce5cf7819d..596df87e583 100644
--- a/htdocs/core/class/html.formother.class.php
+++ b/htdocs/core/class/html.formother.class.php
@@ -782,7 +782,7 @@ class FormOther
 	 *
 	 *  @param	string		$color				String with hex (FFFFFF) or comma RGB ('255,255,255')
 	 *  @param	string		$textifnotdefined	Text to show if color not defined
-	 *  @return	string							HTML code for color thumb
+	 *  @return	void
 	 *  @see selectColor()
 	 */
 	public static function showColor($color, $textifnotdefined = '')
@@ -1091,7 +1091,7 @@ class FormOther
 	 *  @param	string		$option			Option
 	 *  @param	string		$morecss		More CSS
 	 *  @param  bool		$addjscombo		Add js combo
-	 *  @return	string
+	 *  @return	void
 	 *  @deprecated
 	 */
 	public function select_year($selected = '', $htmlname = 'yearid', $useempty = 0, $min_year = 10, $max_year = 5, $offset = 0, $invert = 0, $option = '', $morecss = 'valignmiddle maxwidth75imp', $addjscombo = false)
diff --git a/htdocs/core/filemanagerdol/connectors/php/connector.lib.php b/htdocs/core/filemanagerdol/connectors/php/connector.lib.php
index 694292ef47a..edb688e78bb 100644
--- a/htdocs/core/filemanagerdol/connectors/php/connector.lib.php
+++ b/htdocs/core/filemanagerdol/connectors/php/connector.lib.php
@@ -127,6 +127,7 @@ function SendErrorNode($number, $text)
 	} else {
 		echo '<Error number="'.$number.'" />';
 	}
+	return '';
 }
 
 
diff --git a/htdocs/core/modules/asset/doc/pdf_standard_asset.modules.php b/htdocs/core/modules/asset/doc/pdf_standard_asset.modules.php
index afa3b56b4f5..d62a1eb6ada 100644
--- a/htdocs/core/modules/asset/doc/pdf_standard_asset.modules.php
+++ b/htdocs/core/modules/asset/doc/pdf_standard_asset.modules.php
@@ -1181,7 +1181,7 @@ class pdf_standard_asset extends ModelePDFAsset
 	 *  @param	int			   $hidedetails		Do not show line details
 	 *  @param	int			   $hidedesc		Do not show desc
 	 *  @param	int			   $hideref			Do not show ref
-	 *  @return	null
+	 *  @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
index 1cf3864d333..b078993e718 100644
--- a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
@@ -706,6 +706,7 @@ class pdf_einstein extends ModelePDFCommandes
 	protected function _tableau_versements(&$pdf, $object, $posy, $outputlangs)
 	{
 		// phpcs:enable
+		return 1;
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
diff --git a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
index cb460cff14a..f0a70560499 100644
--- a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
@@ -927,6 +927,7 @@ class pdf_eratosthene extends ModelePDFCommandes
 	 */
 	protected function drawPaymentsTable(&$pdf, $object, $posy, $outputlangs)
 	{
+		return 0;
 	}
 
 	/**
@@ -1733,7 +1734,7 @@ class pdf_eratosthene extends ModelePDFCommandes
 	 *      @param	int				$hidedetails	Do not show line details
 	 *      @param	int				$hidedesc		Do not show desc
 	 *      @param	int				$hideref		Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/delivery/doc/pdf_storm.modules.php b/htdocs/core/modules/delivery/doc/pdf_storm.modules.php
index 7ae6356aabc..c84c9b7e6a0 100644
--- a/htdocs/core/modules/delivery/doc/pdf_storm.modules.php
+++ b/htdocs/core/modules/delivery/doc/pdf_storm.modules.php
@@ -933,7 +933,7 @@ class pdf_storm extends ModelePDFDeliveryOrder
 	 *      @param	int			   $hidedetails		Do not show line details
 	 *      @param	int			   $hidedesc		Do not show desc
 	 *      @param	int			   $hideref			Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/expedition/doc/pdf_espadon.modules.php b/htdocs/core/modules/expedition/doc/pdf_espadon.modules.php
index f6c648f2ff0..16d38e9efeb 100644
--- a/htdocs/core/modules/expedition/doc/pdf_espadon.modules.php
+++ b/htdocs/core/modules/expedition/doc/pdf_espadon.modules.php
@@ -1236,7 +1236,7 @@ class pdf_espadon extends ModelePdfExpedition
 	 *      @param	int			   $hidedetails		Do not show line details
 	 *      @param	int			   $hidedesc		Do not show desc
 	 *      @param	int			   $hideref			Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/export/export_csviso.modules.php b/htdocs/core/modules/export/export_csviso.modules.php
index 6fd66aec769..4e12c32f66c 100644
--- a/htdocs/core/modules/export/export_csviso.modules.php
+++ b/htdocs/core/modules/export/export_csviso.modules.php
@@ -78,7 +78,7 @@ class ExportCsvIso extends ExportCsv
 		global $conf;
 		$conf->global->EXPORT_CSV_FORCE_CHARSET = 'ISO-8859-1';
 
-		parent::write_title($array_export_fields_label, $array_selected_sorted, $outputlangs, $array_types);
+		return parent::write_title($array_export_fields_label, $array_selected_sorted, $outputlangs, $array_types);
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
@@ -96,6 +96,6 @@ class ExportCsvIso extends ExportCsv
 		global $conf;
 		$conf->global->EXPORT_CSV_FORCE_CHARSET = 'ISO-8859-1';
 
-		parent::write_record($array_selected_sorted, $objp, $outputlangs, $array_types);
+		return parent::write_record($array_selected_sorted, $objp, $outputlangs, $array_types);
 	}
 }
diff --git a/htdocs/core/modules/export/export_csvutf8.modules.php b/htdocs/core/modules/export/export_csvutf8.modules.php
index fc79bc79825..a98f3f5f7f8 100644
--- a/htdocs/core/modules/export/export_csvutf8.modules.php
+++ b/htdocs/core/modules/export/export_csvutf8.modules.php
@@ -76,7 +76,7 @@ class ExportCsvUtf8 extends ExportCsv
 		global $conf;
 		$conf->global->EXPORT_CSV_FORCE_CHARSET = 'UTF-8';
 
-		parent::write_title($array_export_fields_label, $array_selected_sorted, $outputlangs, $array_types);
+		return parent::write_title($array_export_fields_label, $array_selected_sorted, $outputlangs, $array_types);
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
@@ -94,6 +94,6 @@ class ExportCsvUtf8 extends ExportCsv
 		global $conf;
 
 		$conf->global->EXPORT_CSV_FORCE_CHARSET = 'UTF-8';
-		parent::write_record($array_selected_sorted, $objp, $outputlangs, $array_types);
+		return parent::write_record($array_selected_sorted, $objp, $outputlangs, $array_types);
 	}
 }
diff --git a/htdocs/core/modules/facture/doc/pdf_sponge.modules.php b/htdocs/core/modules/facture/doc/pdf_sponge.modules.php
index e564ccf5a91..3e75ec686ee 100644
--- a/htdocs/core/modules/facture/doc/pdf_sponge.modules.php
+++ b/htdocs/core/modules/facture/doc/pdf_sponge.modules.php
@@ -2448,7 +2448,7 @@ class pdf_sponge extends ModelePDFFactures
 	 *  @param	int			   $hidedetails		Do not show line details
 	 *  @param	int			   $hidedesc		Do not show desc
 	 *  @param	int			   $hideref			Do not show ref
-	 *  @return	null
+	 *  @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/import/import_xlsx.modules.php b/htdocs/core/modules/import/import_xlsx.modules.php
index 72576e2d2e6..10393084fbd 100644
--- a/htdocs/core/modules/import/import_xlsx.modules.php
+++ b/htdocs/core/modules/import/import_xlsx.modules.php
@@ -341,6 +341,7 @@ class ImportXlsx extends ModeleImports
 		// phpcs:enable
 		$this->workbook->disconnectWorksheets();
 		unset($this->workbook);
+		return 0;
 	}
 
 
diff --git a/htdocs/core/modules/mrp/doc/pdf_vinci.modules.php b/htdocs/core/modules/mrp/doc/pdf_vinci.modules.php
index e625d685727..7ddd983c907 100644
--- a/htdocs/core/modules/mrp/doc/pdf_vinci.modules.php
+++ b/htdocs/core/modules/mrp/doc/pdf_vinci.modules.php
@@ -713,6 +713,7 @@ class pdf_vinci extends ModelePDFMo
 	protected function _tableau_versements(&$pdf, $object, $posy, $outputlangs)
 	{
 		// phpcs:enable
+		return 1;
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
@@ -1365,7 +1366,7 @@ class pdf_vinci extends ModelePDFMo
 	 *      @param	int			   $hidedetails		Do not show line details
 	 *      @param	int			   $hidedesc		Do not show desc
 	 *      @param	int			   $hideref			Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/propale/doc/pdf_azur.modules.php b/htdocs/core/modules/propale/doc/pdf_azur.modules.php
index e9da62a42bb..7e745d2cc7a 100644
--- a/htdocs/core/modules/propale/doc/pdf_azur.modules.php
+++ b/htdocs/core/modules/propale/doc/pdf_azur.modules.php
@@ -903,6 +903,7 @@ class pdf_azur extends ModelePDFPropales
 	protected function _tableau_versements(&$pdf, $object, $posy, $outputlangs)
 	{
 		// phpcs:enable
+		return 1;
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
diff --git a/htdocs/core/modules/propale/doc/pdf_cyan.modules.php b/htdocs/core/modules/propale/doc/pdf_cyan.modules.php
index 56184668f20..e7fbdd1fc5f 100644
--- a/htdocs/core/modules/propale/doc/pdf_cyan.modules.php
+++ b/htdocs/core/modules/propale/doc/pdf_cyan.modules.php
@@ -1875,7 +1875,7 @@ class pdf_cyan extends ModelePDFPropales
 	 *      @param	int				$hidedetails	Do not show line details
 	 *      @param	int				$hidedesc		Do not show desc
 	 *      @param	int				$hideref		Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/stocktransfer/doc/pdf_eagle_proforma.modules.php b/htdocs/core/modules/stocktransfer/doc/pdf_eagle_proforma.modules.php
index 41bbf8c32f9..123048bbb2d 100644
--- a/htdocs/core/modules/stocktransfer/doc/pdf_eagle_proforma.modules.php
+++ b/htdocs/core/modules/stocktransfer/doc/pdf_eagle_proforma.modules.php
@@ -1448,7 +1448,7 @@ class pdf_eagle_proforma extends ModelePDFCommandes
 	 *      @param	int				$hidedetails	Do not show line details
 	 *      @param	int				$hidedesc		Do not show desc
 	 *      @param	int				$hideref		Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/supplier_order/doc/pdf_cornas.modules.php b/htdocs/core/modules/supplier_order/doc/pdf_cornas.modules.php
index 92bd19f52f4..00d819a0156 100644
--- a/htdocs/core/modules/supplier_order/doc/pdf_cornas.modules.php
+++ b/htdocs/core/modules/supplier_order/doc/pdf_cornas.modules.php
@@ -870,6 +870,7 @@ class pdf_cornas extends ModelePDFSuppliersOrders
 	protected function _tableau_versements(&$pdf, $object, $posy, $outputlangs)
 	{
 		// phpcs:enable
+		return 1;
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
@@ -1497,7 +1498,7 @@ class pdf_cornas extends ModelePDFSuppliersOrders
 	 *      @param	int			   $hidedetails		Do not show line details
 	 *      @param	int			   $hidedesc		Do not show desc
 	 *      @param	int			   $hideref			Do not show ref
-	 *      @return	null
+	 *      @return	void
 	 */
 	public function defineColumnField($object, $outputlangs, $hidedetails = 0, $hidedesc = 0, $hideref = 0)
 	{
diff --git a/htdocs/core/modules/supplier_order/doc/pdf_muscadet.modules.php b/htdocs/core/modules/supplier_order/doc/pdf_muscadet.modules.php
index ba4dcd4c2ae..8c6c144f2e4 100644
--- a/htdocs/core/modules/supplier_order/doc/pdf_muscadet.modules.php
+++ b/htdocs/core/modules/supplier_order/doc/pdf_muscadet.modules.php
@@ -752,6 +752,7 @@ class pdf_muscadet extends ModelePDFSuppliersOrders
 	protected function _tableau_versements(&$pdf, $object, $posy, $outputlangs)
 	{
 		// phpcs:enable
+		return 1;
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
diff --git a/htdocs/core/modules/supplier_proposal/doc/pdf_aurore.modules.php b/htdocs/core/modules/supplier_proposal/doc/pdf_aurore.modules.php
index 5a2eaeddf47..0974a0df56f 100644
--- a/htdocs/core/modules/supplier_proposal/doc/pdf_aurore.modules.php
+++ b/htdocs/core/modules/supplier_proposal/doc/pdf_aurore.modules.php
@@ -739,6 +739,7 @@ class pdf_aurore extends ModelePDFSupplierProposal
 	protected function _tableau_versements(&$pdf, $object, $posy, $outputlangs)
 	{
 		// phpcs:enable
+		return 1;
 	}
 
 	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
diff --git a/htdocs/fourn/class/fournisseur.commande.class.php b/htdocs/fourn/class/fournisseur.commande.class.php
index be0d27f83f4..b9288258626 100644
--- a/htdocs/fourn/class/fournisseur.commande.class.php
+++ b/htdocs/fourn/class/fournisseur.commande.class.php
@@ -1591,6 +1591,7 @@ class CommandeFournisseur extends CommonOrder
 						$result = $this->call_trigger('ORDER_SUPPLIER_CREATE', $user);
 						if ($result < 0) {
 							$this->db->rollback();
+
 							return -1;
 						}
 						// End call triggers
@@ -1601,12 +1602,18 @@ class CommandeFournisseur extends CommonOrder
 				} else {
 					$this->error = $this->db->lasterror();
 					$this->db->rollback();
+
 					return -2;
 				}
+			} else {
+				$this->error = 'Failed to get ID of inserted line';
+
+				return -1;
 			}
 		} else {
 			$this->error = $this->db->lasterror();
 			$this->db->rollback();
+
 			return -1;
 		}
 	}
diff --git a/htdocs/fourn/class/fournisseur.facture-rec.class.php b/htdocs/fourn/class/fournisseur.facture-rec.class.php
index b0a975f7df9..6e7b5d60505 100644
--- a/htdocs/fourn/class/fournisseur.facture-rec.class.php
+++ b/htdocs/fourn/class/fournisseur.facture-rec.class.php
@@ -847,29 +847,29 @@ class FactureFournisseurRec extends CommonInvoice
 	}
 
 	/**
-	 *    Add a line to recursive supplier invoice
+	 * Add a line to recursive supplier invoice
 	 *
-	 * @param int $fk_product Product/Service ID predefined
-	 * @param string $ref			Ref
-	 * @param string $label			Label
-	 * @param string $desc 			Description de la ligne
-	 * @param double $pu_ht			Unit price
-	 * @param double $pu_ttc		Unit price with tax
-	 * @param double $qty 			Quantity
-	 * @param int $remise_percent 	Percentage discount of the line
-	 * @param double $txtva 		Taux de tva force, sinon -1
-	 * @param int $txlocaltax1 		Local tax 1 rate (deprecated)
-	 * @param int $txlocaltax2 		Local tax 2 rate (deprecated)
-	 * @param string $price_base_type HT or TTC
-	 * @param int $type 			Type of line (0=product, 1=service)
-	 * @param int $date_start		Date start
-	 * @param int $date_end			Date end
-	 * @param int $info_bits 		VAT npr or not ?
-	 * @param int $special_code 	Special code
-	 * @param int $rang 			Position of line
-	 * @param string $fk_unit 		Unit
-	 * @param int $pu_ht_devise 	Unit price in currency
-	 * @return int                  <0 if KO, Id of line if OK
+	 * @param int 		$fk_product 	Product/Service ID predefined
+	 * @param string 	$ref			Ref
+	 * @param string 	$label			Label
+	 * @param string 	$desc 			Description de la ligne
+	 * @param double 	$pu_ht			Unit price
+	 * @param double 	$pu_ttc			Unit price with tax
+	 * @param double 	$qty 			Quantity
+	 * @param int 		$remise_percent Percentage discount of the line
+	 * @param double 	$txtva 			Taux de tva force, sinon -1
+	 * @param int 		$txlocaltax1 	Local tax 1 rate (deprecated)
+	 * @param int 		$txlocaltax2 	Local tax 2 rate (deprecated)
+	 * @param string 	$price_base_type HT or TTC
+	 * @param int 		$type 			Type of line (0=product, 1=service)
+	 * @param int 		$date_start		Date start
+	 * @param int 		$date_end		Date end
+	 * @param int 		$info_bits 		VAT npr or not ?
+	 * @param int 		$special_code 	Special code
+	 * @param int 		$rang 			Position of line
+	 * @param string 	$fk_unit 		Unit
+	 * @param int 		$pu_ht_devise 	Unit price in currency
+	 * @return int                  	<0 if KO, Id of line if OK
 	 * @throws Exception
 	 */
 	public function addline($fk_product, $ref, $label, $desc, $pu_ht, $pu_ttc, $qty, $remise_percent, $txtva, $txlocaltax1 = 0, $txlocaltax2 = 0, $price_base_type = 'HT', $type = 0, $date_start = 0, $date_end = 0, $info_bits = 0, $special_code = 0, $rang = -1, $fk_unit = null, $pu_ht_devise = 0)
@@ -1031,6 +1031,10 @@ class FactureFournisseurRec extends CommonInvoice
 
 				return -1;
 			}
+		} else {
+			$this->error = 'Recurring Invoice is suspended. adding lines not allowed.';
+
+			return -1;
 		}
 	}
 
diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index 1d005da50ab..9d70d846050 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -3881,6 +3881,8 @@ class User extends CommonObject
 		} else {
 			dol_print_error($this->db);
 		}
+
+		return '';
 	}
 
 	/**