sort(): 将一个数组元素从低到高进行简单排序，这个函数既可以按数字大小排列也可以按字母顺序排列。
Listing A
<?php
$data = array(5,8,1,7,2);
sort($data);
print_r($data);
?>
输出结果如下所示：
Array ([0] => 1
[1] => 2
[2] => 5
[3] => 7
[4] => 8
)rsort(): 对数组元素进行从高到低的倒排，同样可以按数字大小排列也可以按字母顺序排列。
<?php
$data = array(5,8,1,7,2);rsort($data); print_r($data);
?>
它的输出结果如下：
Array ([0] => 8
[1] => 7
[2] => 5
[3] => 2
[4] => 1
)ksort(): 根据关键字进行排序的函数，同时，它在排序的过程中会保持关键字的相关性。
<?php
$data = array("US" => "United States", "IN" => "India", "DE" => "Germany", "ES" => "Spain");
ksort($data);
print_r($data);
?>
它的输出结果如下：
Array ([DE] => Germany
[ES] => Spain
[IN] => India
[US] => United States
)krsort(): 根据关键字对数组进行倒排。
<?php
$data = array("US" => "United States", "IN" => "India", "DE" => "Germany", "ES" => "Spain");
krsort($data);
print_r($data);
?>
它的输出结果如下：
Array ([US] => United States
[IN] => India
[ES] => Spain
[DE] => Germany
)asort(): 使用值排序来取代关键字排序，请注意关键字-值之间的联系会始终保持。
<?php
$data = array("US" => "United States", "IN" => "India", "DE" => "Germany", "ES" => "Spain");
asort($data);
print_r($data);
?>
它的输出结果如下：
Array ([DE] => Germany
[IN] => India
[ES] => Spain
[US] => United States
)arsort(): 根据值按字母表顺序进行倒排。
<?php
$data = array("US" => "United States", "IN" => "India", "DE" => "Germany", "ES" => "Spain");
arsort($data);
print_r($data);
?>
Array ([US] => United States
[ES] => Spain
[IN] => India
[DE] => Germany
)版权声明：本文为zxjor91原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。