how should you run phpstan?

[mscurtescu]

After a composer install I tried running phpstan in two different ways:

1. vendor/bin/phpstan analyze
2. grunt shell:phpstan

With both I am getting over 150 errors, for example:

 ------ ------------------------------------------------------------ 
  Line   openid-connect-generic.php                                  
 ------ ------------------------------------------------------------ 
  145    Function admin_url invoked with 1 parameter, 0 required.    
  148    Function site_url invoked with 1 parameter, 0 required.     
  180    Function add_action invoked with 2 parameters, 0 required.  
  213    Function __ invoked with 2 parameters, 0 required.          
  224    Function get_option invoked with 2 parameters, 0 required.  
  377    Function add_action invoked with 2 parameters, 0 required.  
  380    Function add_action invoked with 3 parameters, 0 required.  
  381    Function add_filter invoked with 3 parameters, 0 required.  
  382    Function add_filter invoked with 3 parameters, 0 required.  
  383    Function add_filter invoked with 3 parameters, 0 required.  
 ------ ------------------------------------------------------------ 

As far as I can tell core WordPress functions like admin_url, site_url and add_filter are not recognised.

I checked and composer did download:

1. vendor/php-stubs/wordpress-stubs
2. vendor/szepeviktor/phpstan-wordpress
3. wordpress

Are all 3 needed? In what order are they loaded?

The level set in phpstan.neon.dist is 5, all these errors show up starting with level 1, only level 0 makes them go away.

Anything else that I might be missing?