[FEATURE] add phpcs, phpmd and phpcbf qa tests

.phpcs.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         name="PHPCS ruleset"
+         xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/squizlabs/PHP_CodeSniffer/master/phpcs.xsd"
+>
+  <description>Test Classes and Tests. Config optimized for local CLO and CI/CD.</description>
+
+  <rule ref="PSR12"/>
+
+  <file>Classes</file>
+
+  <arg name="extensions" value="php" />
+  <arg name="basepath" value="."/>
+  <arg name="colors"/>
+  <arg name="parallel" value="75"/>
+  <arg value="nps"/>
+</ruleset>

.phpmd.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0"?>
+<ruleset name="PHPMD ruleset"
+         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>
+    Adapted the phpmd default config.
+    * Import all rule sets
+    * Allow variables as long as 25 chars
+  </description>
+
+  <rule ref="rulesets/codesize.xml"/>
+  <rule ref="rulesets/controversial.xml">
+    <exclude name="Superglobals"/>
+  </rule>
+  <rule ref="rulesets/design.xml"/>
+  <rule ref="rulesets/naming.xml">
+    <exclude name="LongVariable"/>
+  </rule>
+  <rule ref="rulesets/naming.xml/LongVariable">
+    <properties>
+      <property name="maximum" value="26"/>
+    </properties>
+  </rule>
+  <rule ref="rulesets/unusedcode.xml">
+    <exclude name="UnusedFormalParameter"/>
+  </rule>
+  <rule ref="rulesets/cleancode.xml">
+    <exclude name="StaticAccess"/>
+    <exclude name="ElseExpression"/>
+    <exclude name="LongVariable"/>
+  </rule>
+</ruleset>

composer.json

@@ -22,11 +22,10 @@
 	],
 	"license": "GPL-2.0+",
 	"require": {
-		"php": "^8.0",
+		"php": "^7.4 || ^8.0",
 		"ext-json": "*",
 		"typo3/cms-core": "^11.5"
-	}
-	,
+	},
 	"require-dev": {
 		"helhum/typo3-console": "^7.0",
 		"roave/security-advisories": "dev-latest",
@@ -42,8 +41,12 @@
 		"typo3/cms-recordlist": "^11.5",
 		"typo3/cms-rte-ckeditor": "^11.5",
 		"typo3/cms-tstemplate": "^11.5",
-		"typo3/cms-lowlevel": "^11.5"
+		"typo3/cms-lowlevel": "^11.5",
+		"typo3/testing-framework": "^6.12",
+		"phpmd/phpmd": "^2",
+		"phpcompatibility/php-compatibility": "*"
 	},
+	"prefer-stable" : true,
 	"autoload": {
 		"psr-4": {
 			"In2code\\In2studyfinder\\": "Classes"

readme.md

@@ -118,6 +118,26 @@ npm install
 #### Frontend
 ```npm run build:frontend```
 
+### Testing (phpcs, phpmd)
+
+PHPCS:
+```
+ddev ssh
+./.build/bin/phpcs
+```
+
+PHPMD:
+```
+ddev ssh
+./.build/bin/phpmd Classes/ ansi .phpmd.xml
+```
+
+PHPCBF:
+```
+ddev ssh
+./.build/bin/phpcbf
+```
+
 ## FAQ
 
 * Q1: Can I use fe_users or tt_address for the persons?