我正在使用PHPStorm,所以我会对任何可以自动完成正常工作的解决方案感到满意.

class A
{
    // a bunch of functions go here...
}

/**
 * Class B
 * What should go here to make it work???
 */
class B
{
    private $aInstance;

public function __construct() {
    $this->aInstance = new A();
}

public function __call($name,$arguments) {
    // TODO: Implement __call() method.
    if(method_exists($this->aInstance,$name)) {
        return $this->aInstance->{$name}(...$arguments);
    }
    throw new BadMethodCallException();
}

    // a bunch more functions go here...
}