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 = orange
a = 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