string[] readAndWrite(bool $blocking, bool $close = false) Reads data in file handles and pipes

Process setEnhanceSigchildCompatibility(bool $enhance)

ProcessBuilder setEnv(string $name, null|string

array getOptions() Gets the options for proc_open.

array getDescriptors() Returns an array of descriptors for the use of proc_open.

bool getEnhanceSigchildCompatibility() Returns whether sigchild compatibility mode is activated

string|null getWorkingDirectory() Gets the working directory.

bool hasBeenSignaled() Returns true if the child process has been terminated by an uncaught signal

addErrorOutput(string $line) Adds a line to the STDERR stream.

bool isTerminated() Checks if the process is terminated.