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  • Installation
  • Usage

The Process Component

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Warning: You are browsing the documentation for Symfony 2.0, which is no longer maintained.

Read the updated version of this page for Symfony 6.2 (the current stable version).

The Process Component

The Process Component executes commands in sub-processes.

Installation

You can install the component in many different ways:

  • Use the official Git repository (https://github.com/symfony/Process);
  • Install it via Composer (symfony/process on Packagist).

Usage

The Process class allows you to execute a command in a sub-process:

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use Symfony\Component\Process\Process;

$process = new Process('ls -lsa');
$process->setTimeout(3600);
$process->run();
if (!$process->isSuccessful()) {
    throw new \RuntimeException($process->getErrorOutput());
}

print $process->getOutput();

The run() method takes care of the subtle differences between the different platforms when executing the command.

When executing a long running command (like rsync-ing files to a remote server), you can give feedback to the end user in real-time by passing an anonymous function to the run() method:

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use Symfony\Component\Process\Process;

$process = new Process('ls -lsa');
$process->run(function ($type, $buffer) {
    if ('err' === $type) {
        echo 'ERR > '.$buffer;
    } else {
        echo 'OUT > '.$buffer;
    }
});

If you want to execute some PHP code in isolation, use the PhpProcess instead:

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use Symfony\Component\Process\PhpProcess;

$process = new PhpProcess(<<<EOF
    <?php echo 'Hello World'; ?>
EOF
);
$process->run();
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
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