Php two-dimensional array quick sorting algorithm

The basic theories of the two-dimensional array sorting algorithm and the one-dimensional array sorting algorithm are the same. they both place the small & 20540; in the left-changing array, and the large & 20540; put it in the array on the right, and recursion is performed respectively.

The basic theories of the two-dimensional array sorting algorithm and the one-dimensional array sorting algorithm are the same. they both place small values in the left-changing array by comparison, and the large values in the right array by recursion respectively.

 1,'score'=>76),array('sid'=>2,'score'=>93),array('sid'=>3,'score'=>68.5),array('sid'=>4,'score'=>82.5),array('sid'=>5,'score'=>60.5));print_r(Bubble::main($arr));