usort function in a class

Question

I have a function which sorts data in a multidimensional array, as shown below:

 \"James\");  
         


        

Answer 1

 usort($data, array($this,"order_new"));

is what you want when referring to a function in your class instance. See callable

A method of an instantiated object is passed as an array containing an object at index 0 and the method name at index 1.