【arsort】排序数组(反向排序,返回值保留原键名)
arsort ( array &$array [, int $sort_flags = SORT_REGULAR ] ) : bool
与 asort
函数的唯一区别是:排序的方向不同。
第二个参数效果完全等同于 sort,请参考
https://qianjinyike.com/【sort】排序数组(不再保留键名)
<?php
$fruits = [
"d" => "lemon",
"a" => "orange",
"b" => "banana",
"c" => "apple",
];
arsort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
/*
a = orange
d = lemon
b = banana
c = apple
*/