diff --git a/dev/codesniffer/ruleset.dtd b/dev/codesniffer/ruleset.dtd
index 0d498bb033c..e307d564e12 100755
--- a/dev/codesniffer/ruleset.dtd
+++ b/dev/codesniffer/ruleset.dtd
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!ELEMENT ruleset (description,rule+)>
+<!ELEMENT ruleset (description,exclude-pattern*,rule+)>
 <!ATTLIST ruleset name CDATA "">
 <!ELEMENT description (#PCDATA)>
+<!ELEMENT exclude-pattern (#PCDATA)>
 <!ELEMENT rule (properties*,severity*)>
 <!ATTLIST rule ref CDATA "">
 <!ELEMENT properties (property+)>
diff --git a/dev/codesniffer/ruleset.xml b/dev/codesniffer/ruleset.xml
index 24cc4b46e7b..9c4d5d4f09b 100755
--- a/dev/codesniffer/ruleset.xml
+++ b/dev/codesniffer/ruleset.xml
@@ -3,6 +3,10 @@
 <ruleset name="Dolibarr">
 	<description>Dolibarr coding standard.</description>
 
+	<exclude-pattern>*/conf.php</exclude-pattern>
+	<exclude-pattern>*/includes/*</exclude-pattern>
+	<exclude-pattern>*/documents/*</exclude-pattern>
+
 	<!-- List of all tests -->
 
 	<rule ref="Internal.NoCodeFound">
@@ -18,6 +22,9 @@
 		<severity>0</severity>
 	</rule>
 
+    <!-- The closing ?> tag MUST be omitted from files containing only PHP. -->
+    <!-- <rule ref="Zend.Files.ClosingTag"/> -->
+
     <!-- <rule ref="Generic.CodeAnalysis.ForLoopShouldBeWhileLoop" /> -->
 
     <rule ref="Generic.CodeAnalysis.ForLoopWithTestFunctionCall" />
@@ -46,6 +53,9 @@
 		</rule>
 	-->
 
+    <!-- PHP code MUST use only UTF-8 without BOM. -->
+    <rule ref="Generic.Files.ByteOrderMark"/>
+
 	<!-- Lines can be 85 chars long, but never show errors -->
 	<rule ref="Generic.Files.LineLength">
 		<properties>