| Exception |
| Pipes |
| Tests |
| ExecutableFinder | Generic executable finder. |
| InputStream | Provides a way to continuously write to the input of a Process until the InputStream is closed. |
| PhpExecutableFinder | An executable finder specifically designed for the PHP executable. |
| PhpProcess | PhpProcess runs a PHP script in an independent process. |
| ProcessUtils | ProcessUtils is a bunch of utility methods. |