Symfony2 API
Class

Symfony\Component\Process\Process

class Process

Process is a thin wrapper around proc_* functions to easily start independent PHP processes.

Constants

ERR

OUT

STATUS_READY

STATUS_STARTED

STATUS_TERMINATED

STDIN

STDOUT

STDERR

TIMEOUT_PRECISION

Properties

static array $exitCodes Exit codes translation table.

Methods

__construct(string $commandline, string|null $cwd = null, array $env = null, string|null $input = null, int|float|null $timeout = 60, array $options = array())

Constructor.

__destruct()

__clone()

int run(callable|null $callback = null)

Runs the process.

Process mustRun(callable|null $callback = null)

Runs the process.

Process start(callable|null $callback = null)

Starts the process and returns after writing the input to STDIN.

Process restart(callable|null $callback = null)

Restarts the process.

int wait(callable|null $callback = null)

Waits for the process to terminate.

int|null getPid()

Returns the Pid (process identifier), if applicable.

Process signal(int $signal)

Sends a POSIX signal to the process.

Process disableOutput()

Disables fetching output and error output from the underlying process.

Process enableOutput()

Enables fetching output and error output from the underlying process.

bool isOutputDisabled()

Returns true in case the output is disabled, false otherwise.

string getOutput()

Returns the current output of the process (STDOUT).

string getIncrementalOutput()

Returns the output incrementally.

Process clearOutput()

Clears the process output.

string getErrorOutput()

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

string getIncrementalErrorOutput()

Returns the errorOutput incrementally.

Process clearErrorOutput()

Clears the process output.

null|int getExitCode()

Returns the exit code returned by the process.

null|string getExitCodeText()

Returns a string representation for the exit code returned by the process.

bool isSuccessful()

Checks if the process ended successfully.

bool hasBeenSignaled()

Returns true if the child process has been terminated by an uncaught signal.

int getTermSignal()

Returns the number of the signal that caused the child process to terminate its execution.

bool hasBeenStopped()

Returns true if the child process has been stopped by a signal.

int getStopSignal()

Returns the number of the signal that caused the child process to stop its execution.

bool isRunning()

Checks if the process is currently running.

bool isStarted()

Checks if the process has been started with no regard to the current state.

bool isTerminated()

Checks if the process is terminated.

string getStatus()

Gets the process status.

int stop(int|float $timeout = 10, int $signal = null)

Stops the process.

addOutput(string $line)

Adds a line to the STDOUT stream.

addErrorOutput(string $line)

Adds a line to the STDERR stream.

string getCommandLine()

Gets the command line to be executed.

Process setCommandLine(string $commandline)

Sets the command line to be executed.

float|null getTimeout()

Gets the process timeout (max.

float|null getIdleTimeout()

Gets the process idle timeout (max.

Process setTimeout(int|float|null $timeout)

Sets the process timeout (max.

Process setIdleTimeout(int|float|null $timeout)

Sets the process idle timeout (max.

Process setTty(bool $tty)

Enables or disables the TTY mode.

bool isTty()

Checks if the TTY mode is enabled.

Process setPty(bool $bool)

Sets PTY mode.

bool isPty()

Returns PTY state.

string|null getWorkingDirectory()

Gets the working directory.

Process setWorkingDirectory(string $cwd)

Sets the current working directory.

array getEnv()

Gets the environment variables.

Process setEnv(array $env)

Sets the environment variables.

null|string getInput()

Gets the Process input.

Process setInput(string|null $input)

Sets the input.

array getOptions()

Gets the options for proc_open.

Process setOptions(array $options)

Sets the options for proc_open.

bool getEnhanceWindowsCompatibility()

Gets whether or not Windows compatibility is enabled.

Process setEnhanceWindowsCompatibility(bool $enhance)

Sets whether or not Windows compatibility is enabled.

bool getEnhanceSigchildCompatibility()

Returns whether sigchild compatibility mode is activated or not.

Process setEnhanceSigchildCompatibility(bool $enhance)

Activates sigchild compatibility mode.

checkTimeout()

Performs a check between the timeout definition and the time the process started.

static bool isPtySupported()

Returns whether PTY is supported on the current operating system.

Details

at line 145
public __construct(string $commandline, string|null $cwd = null, array $env = null, string|null $input = null, int|float|null $timeout = 60, array $options = array())

Constructor.

Parameters

string $commandline The command line to run
string|null $cwd The working directory or null to use the working dir of the current PHP process
array $env The environment variables or null to inherit
string|null $input The input
int|float|null $timeout The timeout in seconds or null to disable
array $options An array of options for proc_open

Exceptions

RuntimeException When proc_open is not installed

at line 174
public __destruct()

at line 180
public __clone()

at line 206
public int run(callable|null $callback = null)

Runs the process.

The callback receives the type of output (out or err) and some bytes from the output in real-time. It allows to have feedback from the independent process during execution.

The STDOUT and STDERR are also available after the process is finished via the getOutput() and getErrorOutput() methods.

Parameters

callable|null $callback A PHP callback to run whenever there is some output available on STDOUT or STDERR

Return Value

int The exit status code

Exceptions

RuntimeException When process can't be launched
RuntimeException When process stopped after receiving signal
LogicException In case a callback is provided and output has been disabled

at line 226
public Process mustRun(callable|null $callback = null)

Runs the process.

This is identical to run() except that an exception is thrown if the process exits with a non-zero exit code.

Parameters

callable|null $callback

Return Value

Process

Exceptions

RuntimeException if PHP was compiled with --enable-sigchild and the enhanced sigchild compatibility mode is not enabled
ProcessFailedException if the process didn't terminate successfully

at line 263
public Process start(callable|null $callback = null)

Starts the process and returns after writing the input to STDIN.

This method blocks until all STDIN data is sent to the process then it returns while the process runs in the background.

The termination of the process can be awaited with wait().

The callback receives the type of output (out or err) and some bytes from the output in real-time while writing the standard input to the process. It allows to have feedback from the independent process during execution. If there is no callback passed, the wait() method can be called with true as a second parameter then the callback will get all data occurred in (and since) the start call.

Parameters

callable|null $callback A PHP callback to run whenever there is some output available on STDOUT or STDERR

Return Value

Process The process itself

Exceptions

RuntimeException When process can't be launched
RuntimeException When process is already running
LogicException In case a callback is provided and output has been disabled

at line 321
public Process restart(callable|null $callback = null)

Restarts the process.

Be warned that the process is cloned before being started.

Parameters

callable|null $callback A PHP callback to run whenever there is some output available on STDOUT or STDERR

Return Value

Process The new process

Exceptions

RuntimeException When process can't be launched
RuntimeException When process is already running

See also

start()

at line 348
public int wait(callable|null $callback = null)

Waits for the process to terminate.

The callback receives the type of output (out or err) and some bytes from the output in real-time while writing the standard input to the process. It allows to have feedback from the independent process during execution.

Parameters

callable|null $callback A valid PHP callback

Return Value

int The exitcode of the process

Exceptions

RuntimeException When process timed out
RuntimeException When process stopped after receiving signal
LogicException When process is not yet started

at line 382
public int|null getPid()

Returns the Pid (process identifier), if applicable.

Return Value

int|null The process id if running, null otherwise

Exceptions

RuntimeException In case --enable-sigchild is activated

at line 404
public Process signal(int $signal)

Sends a POSIX signal to the process.

Parameters

int $signal A valid POSIX signal (see http://www.php.net/manual/en/pcntl.constants.php)

Return Value

Process

Exceptions

LogicException In case the process is not running
RuntimeException In case --enable-sigchild is activated
RuntimeException In case of failure

at line 419
public Process disableOutput()

Disables fetching output and error output from the underlying process.

Return Value

Process

Exceptions

RuntimeException In case the process is already running
LogicException if an idle timeout is set

at line 440
public Process enableOutput()

Enables fetching output and error output from the underlying process.

Return Value

Process

Exceptions

RuntimeException In case the process is already running

at line 456
public bool isOutputDisabled()

Returns true in case the output is disabled, false otherwise.

Return Value

bool

at line 471
public string getOutput()

Returns the current output of the process (STDOUT).

Return Value

string The process output

Exceptions

LogicException in case the output has been disabled
LogicException In case the process is not started

at line 495
public string getIncrementalOutput()

Returns the output incrementally.

In comparison with the getOutput method which always return the whole output, this one returns the new output since the last call.

Return Value

string The process output since the last call

Exceptions

LogicException in case the output has been disabled
LogicException In case the process is not started

at line 512
public Process clearOutput()

Clears the process output.

Return Value

Process

at line 530
public string getErrorOutput()

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

Return Value

string The process error output

Exceptions

LogicException in case the output has been disabled
LogicException In case the process is not started

at line 555
public string getIncrementalErrorOutput()

Returns the errorOutput incrementally.

In comparison with the getErrorOutput method which always return the whole error output, this one returns the new error output since the last call.

Return Value

string The process error output since the last call

Exceptions

LogicException in case the output has been disabled
LogicException In case the process is not started

at line 572
public Process clearErrorOutput()

Clears the process output.

Return Value

Process

at line 589
public null|int getExitCode()

Returns the exit code returned by the process.

Return Value

null|int The exit status code, null if the Process is not terminated

Exceptions

RuntimeException In case --enable-sigchild is activated and the sigchild compatibility mode is disabled

at line 613
public null|string getExitCodeText()

Returns a string representation for the exit code returned by the process.

This method relies on the Unix exit code status standardization and might not be relevant for other operating systems.

Return Value

null|string A string representation for the exit status code, null if the Process is not terminated.

Exceptions

RuntimeException In case --enable-sigchild is activated and the sigchild compatibility mode is disabled

See also

http://tldp.org/LDP/abs/html/exitcodes.html
http://en.wikipedia.org/wiki/Unix_signal

at line 629
public bool isSuccessful()

Checks if the process ended successfully.

Return Value

bool true if the process ended successfully, false otherwise

at line 646
public bool hasBeenSignaled()

Returns true if the child process has been terminated by an uncaught signal.

It always returns false on Windows.

Return Value

bool

Exceptions

RuntimeException In case --enable-sigchild is activated
LogicException In case the process is not terminated

at line 671
public int getTermSignal()

Returns the number of the signal that caused the child process to terminate its execution.

It is only meaningful if hasBeenSignaled() returns true.

Return Value

int

Exceptions

RuntimeException In case --enable-sigchild is activated
LogicException In case the process is not terminated

at line 695
public bool hasBeenStopped()

Returns true if the child process has been stopped by a signal.

It always returns false on Windows.

Return Value

bool

Exceptions

LogicException In case the process is not terminated

at line 715
public int getStopSignal()

Returns the number of the signal that caused the child process to stop its execution.

It is only meaningful if hasBeenStopped() returns true.

Return Value

int

Exceptions

LogicException In case the process is not terminated

at line 729
public bool isRunning()

Checks if the process is currently running.

Return Value

bool true if the process is currently running, false otherwise

at line 745
public bool isStarted()

Checks if the process has been started with no regard to the current state.

Return Value

bool true if status is ready, false otherwise

at line 755
public bool isTerminated()

Checks if the process is terminated.

Return Value

bool true if process is terminated, false otherwise

at line 769
public string getStatus()

Gets the process status.

The status is one of: ready, started, terminated.

Return Value

string The current process status

at line 786
public int stop(int|float $timeout = 10, int $signal = null)

Stops the process.

Parameters

int|float $timeout The timeout in seconds
int $signal A POSIX signal to send in case the process has not stop at timeout, default is SIGKILL

Return Value

int The exit-code of the process

Exceptions

RuntimeException if the process got signaled

at line 826
public addOutput(string $line)

Adds a line to the STDOUT stream.

Parameters

string $line The line to append

at line 837
public addErrorOutput(string $line)

Adds a line to the STDERR stream.

Parameters

string $line The line to append

at line 848
public string getCommandLine()

Gets the command line to be executed.

Return Value

string The command to execute

at line 860
public Process setCommandLine(string $commandline)

Sets the command line to be executed.

Parameters

string $commandline The command to execute

Return Value

Process The current Process instance

at line 872
public float|null getTimeout()

Gets the process timeout (max.

runtime).

Return Value

float|null The timeout in seconds or null if it's disabled

at line 882
public float|null getIdleTimeout()

Gets the process idle timeout (max.

time since last output).

Return Value

float|null The timeout in seconds or null if it's disabled

at line 898
public Process setTimeout(int|float|null $timeout)

Sets the process timeout (max.

runtime).

To disable the timeout, set this value to null.

Parameters

int|float|null $timeout The timeout in seconds

Return Value

Process The current Process instance

Exceptions

InvalidArgumentException if the timeout is negative

at line 917
public Process setIdleTimeout(int|float|null $timeout)

Sets the process idle timeout (max.

time since last output).

To disable the timeout, set this value to null.

Parameters

int|float|null $timeout The timeout in seconds

Return Value

Process The current Process instance.

Exceptions

LogicException if the output is disabled
InvalidArgumentException if the timeout is negative

at line 937
public Process setTty(bool $tty)

Enables or disables the TTY mode.

Parameters

bool $tty True to enabled and false to disable

Return Value

Process The current Process instance

Exceptions

RuntimeException In case the TTY mode is not supported

at line 953
public bool isTty()

Checks if the TTY mode is enabled.

Return Value

bool true if the TTY mode is enabled, false otherwise

at line 965
public Process setPty(bool $bool)

Sets PTY mode.

Parameters

bool $bool

Return Value

Process

at line 977
public bool isPty()

Returns PTY state.

Return Value

bool

at line 987
public string|null getWorkingDirectory()

Gets the working directory.

Return Value

string|null The current working directory or null on failure

at line 1005
public Process setWorkingDirectory(string $cwd)

Sets the current working directory.

Parameters

string $cwd The new working directory

Return Value

Process The current Process instance

at line 1017
public array getEnv()

Gets the environment variables.

Return Value

array The current environment variables

at line 1035
public Process setEnv(array $env)

Sets the environment variables.

An environment variable value should be a string. If it is an array, the variable is ignored.

That happens in PHP when 'argv' is registered into the $_ENV array for instance.

Parameters

array $env The new environment variables

Return Value

Process The current Process instance

at line 1055
public null|string getInput()

Gets the Process input.

Return Value

null|string The Process input

at line 1071
public Process setInput(string|null $input)

Sets the input.

This content will be passed to the underlying process standard input.

Parameters

string|null $input The content

Return Value

Process The current Process instance

Exceptions

LogicException In case the process is running

at line 1087
public array getOptions()

Gets the options for proc_open.

Return Value

array The current options

at line 1099
public Process setOptions(array $options)

Sets the options for proc_open.

Parameters

array $options The new options

Return Value

Process The current Process instance

at line 1113
public bool getEnhanceWindowsCompatibility()

Gets whether or not Windows compatibility is enabled.

This is true by default.

Return Value

bool

at line 1125
public Process setEnhanceWindowsCompatibility(bool $enhance)

Sets whether or not Windows compatibility is enabled.

Parameters

bool $enhance

Return Value

Process The current Process instance

at line 1137
public bool getEnhanceSigchildCompatibility()

Returns whether sigchild compatibility mode is activated or not.

Return Value

bool

at line 1153
public Process setEnhanceSigchildCompatibility(bool $enhance)

Activates sigchild compatibility mode.

Sigchild compatibility mode is required to get the exit code and determine the success of a process when PHP has been compiled with the --enable-sigchild option

Parameters

bool $enhance

Return Value

Process The current Process instance

at line 1168
public checkTimeout()

Performs a check between the timeout definition and the time the process started.

In case you run a background process (with the start method), you should trigger this method regularly to ensure the process timeout

Exceptions

ProcessTimedOutException In case the timeout was reached

at line 1192
static public bool isPtySupported()

Returns whether PTY is supported on the current operating system.

Return Value

bool