If you have an object, you can access its member properties through array mode and object mode; 100 min

Class a{
public $aaa = 1;

}

$a =new A ();
Echo $a->aaa; 1
You can also directly:
echo $a [' AAA ']; 1

In PDO, it can be implemented $db->fetch (Pdo::fetch_lazy), which shows that PHP can do the above results; How is the concrete realization?
Principle, thank you;

Reply to discussion (solution)

 
  b = 1; $a [' b '] = 2;echo $a->b;echo $a [' B '];

Arrayobject can inherit, but do not allow subclasses have methods, specific look at the manual I do not know ...
I don't think this thing means anything.

To write a method to implement.

Class a{public    $aaa =1;    function Fetch ($type) {        if ($type = = ' Assoc ') {            $ret = new StdClass ();            $ret->aaa = $this->aaa;        } ElseIf ($type = = ' array ') {            $ret = array ();            $ret [' aaa '] = $this->aaa;        }        return $ret;    }} $d = new A (), $obj = $d->fetch (' Assoc '), Var_dump ($obj), $arr = $d->fetch (' array '); Var_dump ($arr);

Object (StdClass) [2] public  ' aaa ' = + int 1array (size=1)  ' aaa ' = int 1

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