bless function: a better aproach

["Francisco M. Marzoa Alonso" <fmmarzoa@xxxxxxx>]

Giving it a round, this seems to be a better aproach than the previous 
one. It has the advantage of provide direct access to the original array 
obtained from casting without boring about ___FAKE_KEYS_.

<?

function obj2array ( &$Instance ) {
   $clone = (array) $Instance;
   $rtn = array ();
   $rtn['___SOURCE_KEYS_'] = $clone;

   while ( list ($key, $value) = each ($clone) ) {
       $aux = explode ("\0", $key);
       $newkey = $aux[count($aux)-1];
       $rtn[$newkey] = &$rtn['___SOURCE_KEYS_'][$key];
   }

   return $rtn;
}


function bless ( &$Instance, $Class ) {
   if ( ! (is_array ($Instance) ) ) {
       return NULL;
   }

   // First get source keys if available
   if ( isset ($Instance['___SOURCE_KEYS_'])) {
       $Instance = $Instance['___SOURCE_KEYS_'];
   }

   // Get serialization data from array
   $serdata = serialize ( $Instance );

   /* For an array serialized data seems to meant:
        array_tag:array_count:{array_elems}

       array_tag is always 'a'
       array_count is the number of elements in the array
       array_elems are the elemens in the array

     For an object seems to meant:

         
object_tag:object_class_name_len:"object_class_name":object_count:{object_members}

       object_tag is always 'O'
       object_class_name_len is the length in chars of 
object_class_name string
       object_class_name is a string with the name of the class
       object_count is the number of object members
       object_members is the object_members itself (exactly equal to 
array_elems)
   */

   list ($array_params, $array_elems) = explode ('{', $serdata, 2);
   list ($array_tag, $array_count) = explode (':', $array_params, 3 );
   $serdata = "O:".strlen 
($Class).":\"$Class\":$array_count:{".$array_elems;

   $Instance = unserialize ( $serdata );
   return $Instance;
}


class TestClass {
   private $One=1;
   protected $Two=2;
   public $Three=3;

   public function sum() {
       return $this->One+$this->Two+$this->Three;
   }
}


$Obj = new TestClass ();
//$Clone = (array) $Obj;

$Clone = obj2array ( $Obj );

echo "As the original object:<br>";
print_r ($Obj);

echo "<br><br>As an array:<br>";
print_r ($Clone);

$Clone["One"]=7;
$Clone["Two"]=7;
$Clone["Three"]=7;

bless ( $Clone, TestClass );

echo "<br><br>After blessing as a TestClass instance:<br>";
print_r ($Clone);

echo "<br><br>Calling sum method: ";
echo $Clone->sum();

echo "<br>The array was blessed! miracle!!! ;-)<br>";

?>

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