ProcessBuilder setPrefix(string|array $prefix)

close() Closes file handles and pipes.

bool areOpen() Returns if the current state has open file handles or pipes.

string getErrorOutput() Returns the current error output of the process (STDERR).

bool isStarted() Checks if the process has been started with no regard to the current state.

getIterator()

close() Closes file handles and pipes.

Process restart(callable $callback = null)

int run(callable|null $callback = null) Runs the process. The callback receives the type

unblock() Sets non-blocking mode on pipes.