[程式設計] PHP Array陣列排序，介紹PHP常用的7種排序法

分別會介紹隨機排列、大到小排列(根據值、根據Key、不改變index)、小到大排列(根據值、根據Key、不改變index)，總共7種方式排序。

 

程式碼：

<?php //原始陣序 $array = array(5,8,9,5,4,4,2,1,0,5,8,7,4,5,2,6,3,5,1,5); //隨機排序 shuffle($array); echo "隨機排列\n"; print_r($array); //小到大排序(根據值，會改變index) sort($array); echo "小到大排序(根據值，會改變index)\n"; print_r($array); //大到小排序(根據值，會改變index) rsort($array); echo "大到小排序(根據值，會改變index)\n"; print_r($array); //小到大排序(根據值，不改變index) asort($array); echo "小到大排序(根據值，不改變index)\n"; print_r($array); //大到小排序(根據值，不改變index) arsort($array); echo "大到小排序(根據值，不改變index)\n"; print_r($array); //小到大排序(根據key) ksort($array); echo "小到大排序(根據key)\n"; print_r($array); //大到小排序(根據key) krsort($array); echo "大到小排序(根據key)\n"; print_r($array); ?>

執行結果：

隨機排列 Array ( [0] => 2 [1] => 5 [2] => 7 [3] => 5 [4] => 3 [5] => 1 [6] => 4 [7] => 9 [8] => 5 [9] => 4 [10] => 5 [11] => 6 [12] => 5 [13] => 5 [14] => 8 [15] => 8 [16] => 4 [17] => 1 [18] => 2 [19] => 0 ) 小到大排序(根據值，會改變index) Array ( [0] => 0 [1] => 1 [2] => 1 [3] => 2 [4] => 2 [5] => 3 [6] => 4 [7] => 4 [8] => 4 [9] => 5 [10] => 5 [11] => 5 [12] => 5 [13] => 5 [14] => 5 [15] => 6 [16] => 7 [17] => 8 [18] => 8 [19] => 9 ) 大到小排序(根據值，會改變index) Array ( [0] => 9 [1] => 8 [2] => 8 [3] => 7 [4] => 6 [5] => 5 [6] => 5 [7] => 5 [8] => 5 [9] => 5 [10] => 5 [11] => 4 [12] => 4 [13] => 4 [14] => 3 [15] => 2 [16] => 2 [17] => 1 [18] => 1 [19] => 0 ) 小到大排序(根據值，不改變index) Array ( [19] => 0 [17] => 1 [18] => 1 [15] => 2 [16] => 2 [14] => 3 [11] => 4 [12] => 4 [13] => 4 [10] => 5 [9] => 5 [6] => 5 [7] => 5 [5] => 5 [8] => 5 [4] => 6 [3] => 7 [1] => 8 [2] => 8 [0] => 9 ) 大到小排序(根據值，不改變index) Array ( [0] => 9 [2] => 8 [1] => 8 [3] => 7 [4] => 6 [6] => 5 [7] => 5 [8] => 5 [9] => 5 [5] => 5 [10] => 5 [12] => 4 [13] => 4 [11] => 4 [14] => 3 [16] => 2 [15] => 2 [17] => 1 [18] => 1 [19] => 0 ) 小到大排序(根據key) Array ( [0] => 9 [1] => 8 [2] => 8 [3] => 7 [4] => 6 [5] => 5 [6] => 5 [7] => 5 [8] => 5 [9] => 5 [10] => 5 [11] => 4 [12] => 4 [13] => 4 [14] => 3 [15] => 2 [16] => 2 [17] => 1 [18] => 1 [19] => 0 ) 大到小排序(根據key) Array ( [19] => 0 [18] => 1 [17] => 1 [16] => 2 [15] => 2 [14] => 3 [13] => 4 [12] => 4 [11] => 4 [10] => 5 [9] => 5 [8] => 5 [7] => 5 [6] => 5 [5] => 5 [4] => 6 [3] => 7 [2] => 8 [1] => 8 [0] => 9 )