Get size of object in memory in PHP?

The memory_get_usage() function can be called before and after allocating memory for the created class.

class MyBigClass {
   var $allocatedSize;
   var $allMyOtherStuff;
}
function AllocateMyBigClass() {
   $before = memory_get_usage();
   $ret = new MyBigClass;
   $after = memory_get_usage();
   $ret->allocatedSize = ($after - $before);
   return $ret;
}

The output will be the memory of the object relative to the environment settings.

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