在PHP中，排序是我們日常程式設計中經常需要用到的運算之一，針對陣列的排序，PHP提供了多種排序函數來幫助我們完成該任務。
接下來我們就來介紹幾個常見的PHP陣列排序方法。
sort函數是PHP內建的排序函數之一，可以對陣列進行升序排序，也可以對關聯陣列進行排序。
sort函數的語法為：
bool sort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
其中，array為要排序的數組，sort_flags為可選參數，可以用來指定排序方式，如：
範例程式碼：
$numbers = array(1,3,2,5,4); sort($numbers); print_r($numbers);
輸出結果：
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)bool rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
$numbers = array(1,3,2,5,4); rsort($numbers); print_r($numbers);
Array
(
[0] => 5
[1] => 4
[2] => 3
[3] => 2
[4] => 1
)bool asort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
$numbers = array("a"=>1,"c"=>3,"b"=>2,"e"=>5,"d"=>4);
asort($numbers);
print_r($numbers);Array
(
[a] => 1
[b] => 2
[c] => 3
[d] => 4
[e] => 5
)bool arsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
$numbers = array("a"=>1,"c"=>3,"b"=>2,"e"=>5,"d"=>4);
arsort($numbers);
print_r($numbers);Array
(
[e] => 5
[d] => 4
[c] => 3
[b] => 2
[a] => 1
)bool ksort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
$numbers = array("a"=>1,"c"=>3,"b"=>2,"e"=>5,"d"=>4);
ksort($numbers);
print_r($numbers);Array
(
[a] => 1
[b] => 2
[c] => 3
[d] => 4
[e] => 5
)bool krsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
$numbers = array("a"=>1,"c"=>3,"b"=>2,"e"=>5,"d"=>4);
krsort($numbers);
print_r($numbers);Array
(
[e] => 5
[d] => 4
[c] => 3
[b] => 2
[a] => 1
)以上是php+實作陣列排序的方法的詳細內容。更多資訊請關注PHP中文網其他相關文章！
