diff --git a/htdocs/commande/index.php b/htdocs/commande/index.php
index fa1b2064ed2..5731535697e 100644
--- a/htdocs/commande/index.php
+++ b/htdocs/commande/index.php
@@ -123,7 +123,7 @@ if ($resql)
     foreach ($listofstatus as $status)
     {
         $dataseries[]=array('label'=>$commandestatic->LibStatut($status,$bool,1),'data'=>(isset($vals[$status.$bool])?(int) $vals[$status.$bool]:0));
-        if ($status==3 && $bool==false) $bool=true;
+        if ($status==3 && ! $bool) $bool=true;
         else $bool=false;
     }
     if ($conf->use_javascript_ajax)
@@ -147,7 +147,7 @@ if ($resql)
             print '</a>';
             print '</td>';
             print "</tr>\n";
-            if ($status==3 && $bool==false) $bool=true;
+            if ($status==3 && ! $bool) $bool=true;
             else $bool=false;
         }
     }
diff --git a/htdocs/contrat/index.php b/htdocs/contrat/index.php
index 18a60a3429d..250f1c98199 100644
--- a/htdocs/contrat/index.php
+++ b/htdocs/contrat/index.php
@@ -190,7 +190,7 @@ foreach($listofstatus as $status)
         print '<td align="right"><a href="services.php?mode='.$status.($bool?'&filter=expired':'').'">'.($nb[$status.$bool]?$nb[$status.$bool]:0).' '.$staticcontratligne->LibStatut($status,3,($bool?1:0)).'</a></td>';
         print "</tr>\n";
     }
-    if ($status==4 && $bool==false) $bool=true;
+    if ($status==4 && ! $bool) $bool=true;
     else $bool=false;
 }
 if (! empty($conf->use_javascript_ajax))
@@ -210,7 +210,7 @@ foreach($listofstatus as $status)
     	print '<tr '.$bc[$var].'>';
     	print '<td>'.$staticcontratligne->LibStatut($status,0,($bool?1:0)).'</td>';
     	print '<td align="right"><a href="services.php?mode='.$status.($bool?'&filter=expired':'').'">'.($nb[$status.$bool]?$nb[$status.$bool]:0).' '.$staticcontratligne->LibStatut($status,3,($bool?1:0)).'</a></td>';
-    	if ($status==4 && $bool==false) $bool=true;
+    	if ($status==4 && ! $bool) $bool=true;
     	else $bool=false;
         print "</tr>\n";
     }
diff --git a/htdocs/core/db/mssql.class.php b/htdocs/core/db/mssql.class.php
index 2df3e341452..97c72160d76 100644
--- a/htdocs/core/db/mssql.class.php
+++ b/htdocs/core/db/mssql.class.php
@@ -360,7 +360,7 @@ class DoliDBMssql extends DoliDB
                             $query_comp[]=$fld->COLUMN_NAME." IS NOT NULL";
                         }
                     }
-                    if ($query_comp)
+                    if (! empty($query_comp))
                         $query.=" WHERE ".implode(" AND ",$query_comp);
                 }
     		}
diff --git a/htdocs/fichinter/index.php b/htdocs/fichinter/index.php
index 3e629e05789..fc24d8c8326 100644
--- a/htdocs/fichinter/index.php
+++ b/htdocs/fichinter/index.php
@@ -120,7 +120,7 @@ if ($resql)
     foreach ($listofstatus as $status)
     {
         $dataseries[]=array('label'=>$fichinterstatic->LibStatut($status,$bool,1),'data'=>(isset($vals[$status.$bool])?(int) $vals[$status.$bool]:0));
-        if ($status==3 && $bool==false) $bool=true;
+        if ($status==3 && ! $bool) $bool=true;
         else $bool=false;
     }
     if ($conf->use_javascript_ajax)
@@ -144,7 +144,7 @@ if ($resql)
             print '</a>';
             print '</td>';
             print "</tr>\n";
-            if ($status==3 && $bool==false) $bool=true;
+            if ($status==3 && ! $bool) $bool=true;
             else $bool=false;
         }
     }