PHP 連想配列のキーを降順に並び替えてソートする
環境
PHP 8.1.2
Ubuntu 22.04.1 LTS
構文
krsort($対象の連想配列名);
krsort()を使って、引数に指定した連想配列のキー(key)を降順に並び替えてソートします。
連想配列(associative array)のキー(key)を降順に並び替えてソートするには、krsort()を使います。
使用例
<?php
$ns = [
"C" => 12,
"D" => 25,
"B" => 31,
"A" => 44,
"F" => 63,
];
krsort($ns);
print_r($ns);
?>
<?php
$ns = [
"C" => 12,
"D" => 25,
"B" => 31,
"A" => 44,
"F" => 63,
];
krsort($ns);
print_r($ns);
?>
<?php
$ns = [
"C" => 12,
"D" => 25,
"B" => 31,
"A" => 44,
"F" => 63,
];
krsort($ns);
print_r($ns);
?>
実行結果
Array
(
[F] => 63
[D] => 25
[C] => 12
[B] => 31
[A] => 44
)
Array
(
[F] => 63
[D] => 25
[C] => 12
[B] => 31
[A] => 44
)
Array
(
[F] => 63
[D] => 25
[C] => 12
[B] => 31
[A] => 44
)