PHP DB Object: Manipulate objects as arrays

This class can manipulate its objects as arrays.

It implements several operations that make objects work like arrays.

Currently it can convert an array to an object of the class and vice-versa, serialize the object to JSON format, count the number of elements, sort the object elements, merge the elements of two objects, search for elements that match a condition, return a limited range of object elements, create a copy of the object, etc..