在php中排序数组

Question

我有一个数组，比如xyz，下面是var_dump（$ xyz）的输出;

array
    7399 => 
        array
            'count' => int 103
            'name' => string '2º SEMESTRE - 2012' (length=23)
    7398 => 
        array
            'count' => int 50
            'name' => string '1º SEMESTRE - 2012' (length=23)
    7397 => 
        array
            'count' => int 43
            'name' => string '2º SEMESTRE - 2011' (length=23)
    7396 => 
        array
            'count' => int 20
            'name' => string '1º SEMESTRE - 2011' (length=23)
    7395 => 
        array
            'count' => int 53
            'name' => string '2º SEMESTRE - 2010' (length=23)
    'others' => 
        array
            'name' => string 'Others' (length=6)
            'count' => int 65

我想通过count desc对这个数组进行排序，名称asc在底部留下'others'元素。 我使用了下面的array_multisort

// Obtain a list of columns
foreach ($xyz as $key => $row) {
    $count[$key]  = $row['volume'];
    $name[$key] = $row['edition'];
}

// Sort the data with volume descending, edition ascending
// Add $data as the last parameter, to sort by the common key
array_multisort($count, SORT_DESC, $name, SORT_ASC, $xyz);

但失败了。它显示以下警告：

Warning: array_multisort() [function.array-multisort]: Array sizes are inconsistent

想要我想要的是这样的

array
    7399 => 
        array
            'count' => int 103
            'name' => string '2º SEMESTRE - 2012' (length=23)
    7395 => 
        array
            'count' => int 53
            'name' => string '2º SEMESTRE - 2010' (length=23)
    7398 => 
        array
            'count' => int 50
            'name' => string '1º SEMESTRE - 2012' (length=23)
    7397 => 
        array
            'count' => int 43
            'name' => string '2º SEMESTRE - 2011' (length=23)
    7396 => 
        array
            'count' => int 20
            'name' => string '1º SEMESTRE - 2011' (length=23)
    'others' => 
        array
            'name' => string 'Others' (length=6)
            'count' => int 65

请帮忙。感谢所有人的期待！

Answer 1

此问题已经存在well-written answer：

function aasort (&$array, $key) {
    $sorter=array();
    $ret=array();
    reset($array);
    foreach ($array as $ii => $va) {
        $sorter[$ii]=$va[$key];
    }
    asort($sorter);
    foreach ($sorter as $ii => $va) {
        $ret[$ii]=$array[$ii];
    }
    $array=$ret;
}

因此，要按计数排序，请执行以下操作：

aasort($your_array,"count");