如何在PHP中按对象字段对对象数组排序？

Question

I have an array of rows from MySQL query. What I need to do is sort them by one of the fields (unsigned int type). I looked through reference, but did not understand how exactly do I sort arrays of objects, because PHP does not seem to have something like operator overloading (what you do in C++), and some existing functions say they're unstable, meaning that with 2 equal elements their position in sorted array is undefined, which sounds really weird IMO. So, what's the general approach in PHP when you need to sort an array of objects?

Answer 1

You'll need to write your own function to do the comparison. Once you have that function, you can then use usort - http://php.net/manual/en/function.usort.php

Note that this also works with sorting an array of objects, you just have to change your comparison function.