I tried to add objects into array in PHP but it didn't work, tried 2 methods:

#1

```
$obj->var1 = 'string1';
$obj->var2 = 'string1';
$arr[] = $obj;
$obj->var1 = 'string2';
$obj->var2 = 'string2';
$arr[] = $obj;

```

#2 

```
$obj->var1 = 'string1';
$obj->var2 = 'string1';
array_push($arr,$obj);
$obj->var1 = 'string2';
$obj->var2 = 'string2';
array_push($arr,$obj);

```

Both methods will add the latest object into entire array. Seems that object is added to the array by reference. Is there a way to add they into array by value ?