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How to Call Other Commands

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Warning: You are browsing the documentation for Symfony 3.4, which is no longer maintained.

Read the updated version of this page for Symfony 6.3 (the current stable version).

How to Call Other Commands

If a command depends on another one being run before it, instead of asking the user to remember the order of execution, you can call it directly yourself. This is also useful if you want to create a "meta" command that just runs a bunch of other commands (for instance, all commands that need to be run when the project's code has changed on the production servers: clearing the cache, generating Doctrine2 proxies, dumping Assetic assets, ...).

Calling a command from another one is straightforward:

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use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
// ...

protected function execute(InputInterface $input, OutputInterface $output)
{
    $command = $this->getApplication()->find('demo:greet');

    $arguments = [
        'command' => 'demo:greet',
        'name'    => 'Fabien',
        '--yell'  => true,
    ];

    $greetInput = new ArrayInput($arguments);
    $returnCode = $command->run($greetInput, $output);

    // ...
}

First, you find() the command you want to execute by passing the command name. Then, you need to create a new ArrayInput with the arguments and options you want to pass to the command.

Eventually, calling the run() method actually executes the command and returns the returned code from the command (return value from command's execute() method).

Tip

If you want to suppress the output of the executed command, pass a NullOutput as the second argument to $command->run().

Caution

Note that all the commands will run in the same process and some of Symfony's built-in commands may not work well this way. For instance, the cache:clear and cache:warmup commands change some class definitions, so running something after them is likely to break.

Note

Most of the times, calling a command from code that is not executed on the command line is not a good idea. The main reason is that the command's output is optimized for the console and not to be passed to other commands.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
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