function Process::buildCallback

Builds up the callback used by wait().

The callbacks adds all occurred output to the specific buffer and calls the user callback (if present) with the received output.

Parameters

callable|null $callback The user defined PHP callback:

3 calls to Process::buildCallback()

Process::start in vendor/symfony/process/Process.php: Starts the process and returns after writing the input to STDIN.
Process::wait in vendor/symfony/process/Process.php: Waits for the process to terminate.
Process::waitUntil in vendor/symfony/process/Process.php: Waits until the callback returns true.

File

vendor/symfony/process/Process.php, line 1297

Class

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

Namespace

Symfony\Component\Process

Code

protected function buildCallback(?callable $callback = null) : \Closure {
    if ($this->outputDisabled) {
        return fn($type, $data): bool => null !== $callback && $callback($type, $data);
    }
    $out = self::OUT;
    return function ($type, $data) use ($callback, $out) : bool {
        if ($out == $type) {
            $this->addOutput($data);
        }
        else {
            $this->addErrorOutput($data);
        }
        return null !== $callback && $callback($type, $data);
    };
}