多次元配列のソート
array_multisortを使ったに多次元配列のソート方法
PHP
// 多次元配列
$words[0] = array(
'id' => '1',
'word' => 'Apple',
'meaning' => 'リンゴ'
);
$words[1] = array(
'id' => '2',
'word' => 'Banana',
'meaning' => 'バナナ'
);
$words[2] = array(
'id' => '3',
'word' => 'Cat',
'meaning' => 'ネコ'
);
$words[3] = array(
'id' => '4',
'word' => 'Dog',
'meaning' => 'イヌ'
);
$words[4] = array(
'id' => '5',
'word' => 'Coffee',
'meaning' => 'コーヒー'
);
$words[5] = array(
'id' => '6',
'word' => 'Milk',
'meaning' => 'ミルク'
);
$words[6] = array(
'id' => '7',
'word' => 'Tennis',
'meaning' => 'テニス'
);
$words[7] = array(
'id' => '8',
'word' => 'Basketball',
'meaning' => 'バスケットボール'
);
if (! empty($words)) {
for ($i = 0; $i < count($words); $i++) {
foreach($words[$i] as $wordKey => $wordVal) {
$arr[$wordKey][] = $wordVal;
}
}
}
/*
print_r($arr);
Array
(
[id] => Array
(
[0] => 1
[1] => 2
(略)
[6] => 7
[7] => 8
)
[word] => Array
(
[0] => Apple
[1] => Banana
(略)
[6] => Tennis
[7] => Basketball
)
[meaning] => Array
(
[0] => リンゴ
[1] => バナナ
(略)
[6] => テニス
[7] => バスケットボール
)
)
*/
// word順は$arr['word']、meaning順は$arr['meaning']
// 昇順はSORT_ASC、降順はSORT_DESC
array_multisort(
$arr['word'], SORT_ASC,
$words
);
word順
Array
(
[0] => Array
(
[id] => 1
[word] => Apple
[meaning] => リンゴ
)
[1] => Array
(
[id] => 2
[word] => Banana
[meaning] => バナナ
)
[2] => Array
(
[id] => 8
[word] => Basketball
[meaning] => バスケットボール
)
[3] => Array
(
[id] => 3
[word] => Cat
[meaning] => ネコ
)
[4] => Array
(
[id] => 5
[word] => Coffee
[meaning] => コーヒー
)
[5] => Array
(
[id] => 4
[word] => Dog
[meaning] => イヌ
)
[6] => Array
(
[id] => 6
[word] => Milk
[meaning] => ミルク
)
[7] => Array
(
[id] => 7
[word] => Tennis
[meaning] => テニス
)
)
meaning順
Array
(
[0] => Array
(
[id] => 4
[word] => Dog
[meaning] => イヌ
)
[1] => Array
(
[id] => 5
[word] => Coffee
[meaning] => コーヒー
)
[2] => Array
(
[id] => 7
[word] => Tennis
[meaning] => テニス
)
[3] => Array
(
[id] => 3
[word] => Cat
[meaning] => ネコ
)
[4] => Array
(
[id] => 8
[word] => Basketball
[meaning] => バスケットボール
)
[5] => Array
(
[id] => 2
[word] => Banana
[meaning] => バナナ
)
[6] => Array
(
[id] => 6
[word] => Milk
[meaning] => ミルク
)
[7] => Array
(
[id] => 1
[word] => Apple
[meaning] => リンゴ
)
)
