Default Behavior

By default, errors are reported using PHP's error_log() .

Custom Error Reporter

You MAY provide a custom error reporter by implementing ErrorReporterInterface :

use FastForward\Defer\Defer;
use FastForward\Defer\ErrorReporterInterface;

Defer::setErrorReporter(new class implements ErrorReporterInterface {
    public function report(Throwable $throwable, ?callable $callback = null, array $args = []): void {
        echo '[custom reporter] ' . $throwable::class . ': ' . $throwable->getMessage() . "\n";
    }
});

NullErrorReporter

Suppresses all error output:

use FastForward\Defer\ErrorReporter\NullErrorReporter;
Defer::setErrorReporter(new NullErrorReporter());

CompositeErrorReporter

Allows reporting to multiple destinations:

use FastForward\Defer\ErrorReporter\CompositeErrorReporter;
use FastForward\Defer\ErrorReporter\ErrorLogErrorReporter;

$stdoutReporter = new class implements ErrorReporterInterface {
    public function report(Throwable $throwable, ?callable $callback = null, array $args = []): void {
        echo '[stdout] ' . $throwable->getMessage() . "\n";
    }
};

Defer::setErrorReporter(new CompositeErrorReporter(new ErrorLogErrorReporter(), $stdoutReporter));