我如何排序这个二维数组的PHP

Question

I have a conditional that gives my array the value of 2 if its empty otherwise the value will be 1, what I want is to sort this bidimensinal by the value of the associative index for example

$arr[$n]["key"] = 1;
$arr[$n]["key"] = 1;
$arr[$n]["key"] = 1;
$arr[$n]["key"] = 2;
$arr[$n]["key"] = 2;

What I want to do is first print the number 1's and then the number 2's

I've tried all the methods on this page and nothing works.. please help me. Thanks!

Answer 1

You can just sort your array with asort, quick example:

<?php

$arr[0][1] = 1;
$arr[0][2] = 1;
$arr[0][3] = 2;
$arr[0][4] = 2;
$arr[0][5] = 1;

asort($arr[0]);

var_dump($arr[0]);

Then you can foreach sort this array with a loop;

Answer 2

There is a very cool table to choose the function for the excepted result:

http://php.net/manual/en/array.sorting.php