站长图库向大家介绍了PHP中对数组进行排序,数组排序等相关知识,希望对您有所帮助
PHP中数组是较为常用的数据类型，如何对数组中的数据进行排序，以方便对数据进行管理，本文就带大家一起来看一看如何利用PHP内置函数对数组进行排序。
1、依据数组键值对数组排序
<?php$arr1 = array(3,1,5,2,0);sort($arr1);print_r($arr1);echo "<br>"; $arr2 = array(3,1,5,2,0);rsort($arr2);print_r($arr2);?>
输出：
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 5 )Array ( [0] => 5 [1] => 3 [2] => 2 [3] => 1 [4] => 0 )
sort() - 对数组进行升序排列； rsort() - 对数组进行降序排列
2、依据关联数组键值对数组排序
<?php$fruits1 = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");arsort($fruits1);foreach ($fruits1 as $key => $val) { echo "$key = $val;";}echo "<br>";$fruits2 = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");asort($fruits2);foreach ($fruits2 as $key => $val) { echo "$key = $val\n";}?>输出：
a = orange;d = lemon;b = banana;c = apple;c = apple b = banana d = lemon a = orange
arsort() - 根据关联数组的值，对数组进行降序排列；asort() - 根据关联数组的值，对数组进行升序排列
3、根据关联数组的键对数组排序
<?php$fruits1 = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");krsort($fruits1);foreach ($fruits1 as $key => $val) { echo "$key = $val\n";}echo "<br>"; $fruits2 = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");ksort($fruits2);foreach ($fruits2 as $key => $val) { echo "$key = $val\n";}?>输出：
d = lemon c = apple b = banana a = orangea = orange b = banana c = apple d = lemon
krsort() - 根据关联数组的键，对数组进行降序排列；ksort() - 根据关联数组的键，对数组进行升序排列