PHP中數組是較為常用的數據類型，如何對數組中的數據進行排序，以方便對數據進行管理，本文就帶大家一起來看一看如何利用PHP內置函數對數組進行排序。
1、依據數組鍵值對數組排序
<?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); ?>
輸出：
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 5 ) Array ( [0] => 5 [1] => 3 [2] => 2 [3] => 1 [4] => 0 )
sort() - 對數組進行升序排列； rsort() - 對數組進行降序排列
2、依據關聯數組鍵值對數組排序
<?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";
}
?>輸出：
a = orange;d = lemon;b = banana;c = apple; c = apple b = banana d = lemon a = orange
arsort() - 根據關聯數組的值，對數組進行降序排列；asort() - 根據關聯數組的值，對數組進行升序排列
3、根據關聯數組的鍵對數組排序
<?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";
}
?>輸出：
d = lemon c = apple b = banana a = orange a = orange b = banana c = apple d = lemon
krsort() - 根據關聯數組的鍵，對數組進行降序排列；ksort() - 根據關聯數組的鍵，對數組進行升序排列
