1. Tools

• XAMPP
• PHPUnit
• https://www.codacy.com
  • http://phpmd.org
• http://xdebug.org
• https://phpstan.org
• 🦊 Firefox
  • Web Developer
  • Quick Locale Switcher
  • User Agent Switcher
  • uMatrix
  • Livemarks - FF 64 removed the RSS reader!
  • Laboratory (Content Security Policy / CSP Toolkit)
• Lynx - Do the test, all essential functionality must work WHITHOUT JavaScript.

  • lynx https://wackowiki.org/doc/Doc/English/Markup	

2. Testing

1. Test new patches - try them out and see what breaks
2. Do performance tests - compare versions & settings
3. Do security audits
4. Do benchmarks
5. Do localization checks
6. Check standards / spec compliance - SQL, XML, APIs, ...
   1. https://developers.google.com/speed/pagespeed/insights/
   2. https://securityheaders.io
   3. HTML validator
   4. CSS validator
   5. Feed validator
   6. https://web.dev/measure
   7. WAVE – Online accessibility validator
   8. http://jshint.com
   9. http://www.webpagetest.org - Test a website's performance
   10. W3C Internationalization Checker
   11. REDbot - lint for HTTP resources; it tests protocol correctness, cacheability, content negotiation and more.
   12. https://regex101.com/ - Online regex tester and debugger

1. https://github.com/mozilla/readability - test with firefox reading mode
2. Test integration - does the new version work with all scripts & dbs?

3. Debugging

1. check error logs
   1. \apache\logs\error.log
   2. \php\logs\php_error_log

3.1. Debug options

3.1.1. Primary config

config/config.php

1. set sql_mode in primary config to 2 to enable SQL Session Strict mode

    'sql_mode' => '2',	

3.1.2. Secondary config

config table (Admin Panel -> System)

1. set 'debug' in secondary config to 3
2. set cache in secondary config to 0
3. set cache_sql in secondary config to 0

3.1.3. Constants

config/constants.php

1. set DB_ERROR_MODE in config/constants.php

   const DB_ERROR_MODE	= 1;	

   1. Warning
   2. Exception (Fatal error)
2. set PHP_ERROR_REPORTING in config/constants.php

   const PHP_ERROR_REPORTING	= 6;	

   1. Fatal error
   2. Parse error
   3. Warning
   4. Notice

3.2. php_error_log

[19-May-2022 11:31:23 Mittelerde/Auenland] PHP Deprecated:  preg_match_all(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/hobbit/git/wackowiki/src/formatter/class/typografica.php on line 134
[19-May-2022 11:31:23 Mittelerde/Auenland] PHP Deprecated:  preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/hobbit/git/wackowiki/src/formatter/class/typografica.php on line 135	

3.3. Debug functions

1. to write a parameter in the debug log
   • Ut::dbg('debug_variable', $parameter);
2. add debug output to DEBUG file and popup-window in browser
   • Diag::dbg($parameter);
   • to highlight the debug output in the console add '[BLUE|GOLD|ORANGE|RED]' as the first argument
     • e.g. Diag::dbg('GOLD', $parameter);
     • Diag::dbg('GOLD', 'Message set:', $lang, $name, @$this->user_lang, @$this->page_lang, @$this->notify_lang);

3.3.1. Example

Diag::dbg('preprocess', $parser->preprocess ? 'true' : 'false');

;
-0.2427	formatter/wacko.php:50	preprocess false
-0.2365	formatter/wacko.php:50	preprocess true
-0.0547	formatter/wacko.php:50	preprocess false
0.0332	formatter/wacko.php:50	preprocess false	

3.3.2. File permissions

In both cases it writes the $parameter to the log in the main directory src/DEBUG when the config debug is enabled.
Be aware the log isn't emptied automatically. Ensure that the file src/DEBUG can be created and is writable.

touch DEBUG
chmod 0664 DEBUG