※ 引述《picachuxyz (XHTML&CSS&JS&PHP)》之銘言:
: 一個二維陣列array[$i][$j],$i和$j從1~10,
: 如何針對array[$i][5]作大到小的排序,$i從1~10?
可以用
array-multisort的function
Example data:
volume | edition
-------+--------
67 | 2
86 | 1
85 | 6
98 | 2
86 | 6
67 | 7
<?php
$data[] = array('volume' => 67, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 1);
$data[] = array('volume' => 85, 'edition' => 6);
$data[] = array('volume' => 98, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 6);
$data[] = array('volume' => 67, 'edition' => 7);
foreach ($data as $key => $row) {
$volume[$key] = $row['volume'];
$edition[$key] = $row['edition'];
}
// Sort the data with volume descending, edition ascending
// Add $data as the last parameter, to sort by the common key
array_multisort($volume, SORT_DESC, $edition, SORT_ASC, $data);
?>
echo 出來資料的排序會如下
volume | edition
-------+--------
98 | 2
86 | 1
86 | 6
85 | 6
67 | 2
67 | 7
不知道這是不是你要的...
以上資料來源
http://www.php.net/manual/tw/function.array-multisort.php
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