Question

class Parent
{
 public function exec()
 {
  // here I need the child object!
 }
}

class Child extends Parent
{
 public function exec()
 {
  // something
  parent::exec();
 }
}

如你能看到的那样,我需要孩子的父母。我怎么能做到这一点?

Answer 1

You can pass the child as an argument:

class ParentClass
{
    public function exec( $child )
    {
        echo  Parent exec ;
        $child->foo();
    }
}

class Child extends ParentClass
{
    public function exec()
    {
        parent::exec( $this );
    }

    public function foo() 
    {
        echo  Child foo ;
    }
}

很少需要这样做,因此,或许还有更好的途径来做

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