排序陣列在array_multisort

Question

我有以下陣列：

$array = array(
     'note' => array(), 
     'year' => array('2011','2010', '2012'), 
     'type' => array('conference', 'journal', 'conference'), 
    ); 

我使用下面的函數使用的字段類型和另一個數組的數組進行排序：

function array_multisort_by_order(array $array, $by, array $order) 
{ 
    $order = array_flip($order); 
    $params[] = $array[$by]; 
    foreach($params[0] as &$v) $v = $order[$v]; 
    foreach($array as &$v) $params[] = &$v; unset($v); 
    call_user_func_array('array_multisort', $params); 
    return $array; 
} 

當我撥打以下功能我得到以下錯誤：

$array = array_multisort_by_order($array, 'type', array('conference', 'journal')); 

print_r($array['type']); 

錯誤：

Warning: array_multisort(): Array sizes are inconsistent. 

我知道數組是不一致的。有更好的功能使用嗎？

請檢查：codepad

所需的輸出：

Array 
(
[note] => Array 
    (
     [0] => 
     [1] => 
     [2] => 
    ) 

[year] => Array 
    (
     [0] => 2011 
     [1] => 2012 
     [2] => 2010 
    ) 

[type] => Array 
    (
     [0] => conference 
     [1] => conference 
     [2] => journal 
    ) 

) 

實施例2：

陣列

$array = array(
     'note' => array([0]=>'test1', [1]=>'test2'), 
     'year' => array([0]=>'2011', [2]=>'2012'), 
     'type' => array([0]=>'conference',[1]=>'journal', [2]=>'conference'), 
    ); 

所需的結果2

Array 
(
[note] => Array 
    (
     [0] => test1 
     [1] => 
     [2] => tes2 
    ) 

[year] => Array 
    (
     [0] => 2011 
     [1] => 2012 
     [2] => 
    ) 

[type] => Array 
    (
     [0] => conference 
     [1] => conference 
     [2] => journal 
    ) 

) 

感謝

Answer 1

OK，所以，想到的第一個解決方案之一是增加在空值，以使它們保持一致：

function array_multisort_by_order(array $array, $by, array $order) 
{ 
    $max = max(array_map('count',$array)); 
    //or, alternatively, depending on input (if there are no 'complete' subarrays): 
    //$max = max(array_map(function($arr){return max(array_keys($arr));},$array))+1; 

    //ADDITION: negative numeric keys: 
    $min = min(array_map(function($arr){return min(array_keys($arr));},$array)); 
    $width = $max - min(0,$min); 

    foreach($array as &$sub){ 
     // $addin = array_diff_key(array_fill(0,$max,null),$sub); 
     // $addin changed for negative keys: 
     $addin = array_diff_key(array_combine(range($min,$max),array_fill(0,$width,null)),$sub); 
     $sub = $addin + $sub; 
     ksort($sub); 
    } 
    $order = array_flip($order); 
    $params[] = $array[$by]; 
    foreach($params[0] as &$v) $v = $order[$v]; 
    foreach($array as &$v) $params[] = &$v; unset($v); 
    call_user_func_array('array_multisort', $params); 
    //no closeures here: 
    //foreach($array as &$sub) $sub = array_filter(function($a){return !is_null($a);},$sub); 
    $filter = create_function('$a','return !is_null($a);'); 
    foreach($array as &$sub) $sub = array_filter($sub,$filter); 
    return $array; 
}