Adding PHPMD

composer.json

@@ -22,6 +22,7 @@
         "firebase/php-jwt": "6.*",
         "misantron/dbunit": "dev-master",
         "nyholm/psr7": "^1.8",
+        "phpmd/phpmd": "^2.15",
         "phpstan/phpstan": "^1.10",
         "phpunit/phpunit": "^9.5",
         "squizlabs/php_codesniffer": "^3.9"
@@ -56,7 +57,9 @@
         "cs-check": "phpcs --colors -p src/ tests/",
         "cs-fix": "phpcbf --colors src/ tests/",
         "test": "phpunit",
-        "test-coverage": "phpunit --coverage-clover=clover.xml"
+        "test-coverage": "phpunit --coverage-clover=clover.xml",
+        "phpmd": "bin/phpmd src/ text phpmd.xml.dist",
+        "phpmd-baseline": "bin/phpmd --generate-baseline --baseline-file phpmd.baseline.xml src/ text phpmd.xml.dist"
     },
     "config": {
         "sort-packages": true,

phpmd.baseline.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<phpmd-baseline>
+    <violation rule="PHPMD\Rule\Design\CouplingBetweenObjects" file="src/AuthenticationService.php"/>
+    <violation rule="PHPMD\Rule\CleanCode\StaticAccess" file="src/Authenticator/JwtAuthenticator.php"/>
+    <violation rule="PHPMD\Rule\UnusedFormalParameter" file="src/Identifier/Ldap/ExtensionAdapter.php"/>
+    <violation rule="PHPMD\Rule\UnusedFormalParameter" file="src/Identity/Identity.php"/>
+</phpmd-baseline>

phpmd.xml.dist

@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<ruleset name="My first PHPMD rule set"
+         xmlns="http://pmd.sf.net/ruleset/1.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0
+                       http://pmd.sf.net/ruleset_xml_schema.xsd"
+         xsi:noNamespaceSchemaLocation="
+                       http://pmd.sf.net/ruleset_xml_schema.xsd">
+  <description>
+    PHPMD Rules
+  </description>
+
+  <rule ref="rulesets/codesize.xml" />
+  <rule ref="rulesets/cleancode.xml" />
+  <rule ref="rulesets/design.xml">
+  </rule>
+  <rule ref="rulesets/naming.xml">
+    <exclude name="LongVariable"/>
+    <exclude name="LongClassName"/>
+  </rule>
+  <rule ref="rulesets/unusedcode.xml" />
+</ruleset>