PHP two-dimensional array sorting code _php tutorial

A simple PHP two-dimensional array is sorted by the elements in the second dimension so that it does not affect the data, only the contents of the array to sort, the need for a friend reference.

The code is as follows	Copy Code
$ar = Array ( 0 = = Array (' A ' =>5, ' B ' =>3, ' C ' =>3), 1 = = Array (' A ' =>5, ' B ' =>2, ' C ' =>1), 2 = = Array (' A ' =>1, ' B ' =>1, ' C ' =>2) ); $a = array (); $b = Array (); foreach ($ar as $k = = $v) { $a [$k] = $v [' a ']; $b [$k] = $v [' B ']; $c [$k] = $v [' C ']; } Array_multisort ($a, SORT_ASC, $ar); Array_multisort ($a, Sort_desc, $b, SORT_ASC, $ar); Print_r ($ar);

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