# phpstan > A PHP static analysis tool to discover bugs in code. > More information: . - Analyze one or more directories: `phpstan analyse {{path/to/directory1 path/to/directory2 ...}}` - Analyze a directory using a configuration file: `phpstan analyse {{path/to/directory}} {{[-c|--configuration]}} {{path/to/config}}` - Analyze using a specific rule level (0-10, higher is stricter): `phpstan analyse {{path/to/directory}} {{[-l|--level]}} {{level}}` - Specify an autoload file to load before analyzing: `phpstan analyse {{path/to/directory}} {{[-a|--autoload-file]}} {{path/to/autoload_file}}` - Specify a memory limit during analysis: `phpstan analyse {{path/to/directory}} --memory-limit {{memory_limit}}` - Display available options for analysis: `phpstan analyse --help`