Symfony Process - execute command from service

Question

How can I run a command (app/console execute:my:command) in a service via new Process?

I try this:

use Symfony\Component\Process\Process;
use Symfony\Component\Process\Exception\ProcessFailedException;

$process = new Process(
    'app/console execute:my:command'
);
$process->start();

But nothing happens ... If I call it manually via terminal it works:

app/console execute:my:command

What am I doing wrong?

EDIT - Solution: We need to write the whole path. In my case:

($this->kernelRootDir is : %kernel.root_dir%)

$processString = sprintf(
    'php %s/../app/console %s %s',
    $this->kernelRootDir,
    self::MY_COMMAND,
    $myArgument
);

$process = new Process($processString);
$process->start();

if (!$process->isSuccessful()) {
    throw new ProcessFailedException($process);
}

Answer 1

This is pretty much all you need to do really. I always set the working directory and assume this is needed so that the Symfony command is run from the root of the project

$process = new Process(
    'app/console execute:my:command'
);
$process->setWorkingDirectory(getcwd() . "../");

$process->start();

For debugging purposes I generally set

$process->setOptions(['suppress_errors' => false]);

as well