TASK: Add initial version

broken.php

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+<?php
+
+echo 'test'

readme.rst

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+Linting Talk
+============
+
+What is linting
+---------------
+
+   A linter or lint refers to tools that analyze source code to flag programming
+   errors, bugs, stylistic errors, and suspicious constructs. The term originates
+   from a Unix utility that examined C language source code.
+
+   — https://en.wikipedia.org/wiki/Lint_(software)
+
+Why do I need it?
+-----------------
+
+* Prevent syntax errors = 500 http error in production.
+
+* Prevent bugs.
+
+* Validate coding guideline = Prevent unnecessary merge conflicts.
+
+* Reduce complexity and mental overhead.
+
+What to lint
+------------
+
+PHP
+^^^
+
+* PHP Native
+
+  Local::
+
+     php -l broken.php
+     php -l valid.php
+
+  For CI::
+
+     php -l broken.php > /dev/null; echo $?
+     php -l valid.php > /dev/null; echo $?
+
+     find localPackages/ -name \*.php | parallel --gnu php -d display_errors=stderr -l {} > /dev/null \;
+
+* PHP Code Sniffer
+  Checks for Coding Guideline, best practices like no debugging code.
+
+  Extendable, Multiple languages, php, js, typoscript, …
+  Lint and fix.
+  Integrated into IDEs, Editors and CI.
+
+* PHPMD
+  https://phpmd.org/
+  https://phpmd.org/rules/index.html
+
+* phpstan
+  https://github.com/phpstan/phpstan
+  https://packagist.org/packages/saschaegerer/phpstan-typo3
+
+  PHP >= 7.1
+  No configuration necessary
+
+* phan
+  https://github.com/phan/phan
+
+  Awesome, but needs configuration file.
+
+* https://phpqa.io/
+
+* https://www.owasp.org/index.php/OWASP_WAP-Web_Application_Protection
+
+TypoScript
+^^^^^^^^^^
+
+https://github.com/martin-helmich/typo3-typoscript-lint
+
+XML / XLIFF
+^^^^^^^^^^^
+
+http://xmlsoft.org/xmllint.html
+
+JSON / composer.json
+^^^^^^^^^^^^^^^^^^^^
+
+`composer validate`
+
+YAML (Form extension)
+^^^^^^^^^^^^^^^^^^^^^
+
+https://github.com/adrienverge/yamllint
+
+Summary
+-------
+
+Check out possible linter. Integrate linter in CI, optionally also in local IDEs
+/editors.
+
+Prevent "dumb" issues like invalid PHP syntax.
+
+Prevent some security issues.
+
+Further reading
+---------------
+
+* https://www.owasp.org/index.php/Static_Code_Analysis
+
+* https://en.wikipedia.org/wiki/List_of_tools_for_static_code_analysis
+
+* https://phpqa.io/

valid.php

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+<?php
+
+echo 'test';