On Windows Systems:
- Install PHP TS (Thread Safe)
- Download Extension from PECL (PHP-Version, Thread Safe (TS), Compiler - Version (VC15, VC16), Architecture must match)
- Copy extension to folder: <your php dir>/ext/php_parallel.dll
- Copy app to folder: <your php dir>/pthreadVC2.dll (It is important to copy pthreadVC2.dll not into the ext folder!)
- add pthreadVC2.dll to windows system environment path
- add in php.ini the line extension=parallel to load the extension
- restart