http://symfony.com/doc/current/setup.html

The current method to copy the file doesn't save in UTF8 which seems to lead to some garbled content:

php -r "readfile('https://symfony.com/installer');" > symfony

It's better to use file_put_contents as noted in the installer repo as it will save with the correct encoding (https://github.com/symfony/symfony-installer).

The step to create the symfony.bat file is also missing so the global command cannot work and will result in an error since no symfony.exe or symfony.bat file exists in the PATH.

'symfony' is not recognized as an internal or external command, operable program or batch file.