合併多維數組（PHP）

Question

說我有一個相同的結構，像這樣一對夫婦多維動數組：

Array ([0] => Tips Object ([id] => 1 [userId] => 10) 
    [1] => Tips Object ([id] => 2 [userId] => 22) 
    [2] => Tips Object ([id] => 3 [userId] => 33) 
    [3] => Tips Object ([id] => 7 [userId] => 77)) 


Array ([0] => Tips Object ([id] => 2 [userId] => 22) 
    [1] => Tips Object ([id] => 3 [userId] => 33) 
    [2] => Tips Object ([id] => 4 [userId] => 44) 
    [3] => Tips Object ([id] => 5 [userId] => 55) 
    [4] => Tips Object ([id] => 6 [userId] => 66)) 

我需要一種方式，一種方式來合併它們，所以我會得到這樣的：

Array ([0] => Tips Object ([id] => 1 [userId] => 10) 
    [1] => Tips Object ([id] => 2 [userId] => 22) 
    [2] => Tips Object ([id] => 3 [userId] => 33) 
    [3] => Tips Object ([id] => 4 [userId] => 44) 
    [4] => Tips Object ([id] => 5 [userId] => 55) 
    [5] => Tips Object ([id] => 6 [userId] => 66) 
    [6] => Tips Object ([id] => 7 [userId] => 77)) 

真正的多維數組將會更復雜，這個只是爲了幫助解釋我需要的東西。

謝謝！

Answer 1

我假設你要做的是將兩個已排序的序列（通過id或userid）合併到一個最終的排序序列中。在這種情況下，看看在合併過程用作歸併的一部分：http://en.wikipedia.org/wiki/Merge_sort#Algorithm

Answer 2

$array1=array( 0=>array('id'=>'1','userid'=>'10'), 
       1=>array('id'=>'2','userid'=>'22'), 
       2=>array('id'=>'3','userid'=>'33'), 
       3=>array('id'=>'7','userid'=>'77')); 

$array2=array( 0=>array('id'=>'2','userid'=>'22'), 
       1=>array('id'=>'3','userid'=>'33'), 
       2=>array('id'=>'4','userid'=>'44'), 
       3=>array('id'=>'5','userid'=>'55'), 
       4=>array('id'=>'6','userid'=>'66')); 

echo "<pre>"; 

$mix = array(); 
foreach($array2 as $k=>$value) 
{ 
    if(!in_array($value,array_values($array1))){ 
     $array1[] = $value; 
    } 
} 


function sortById($a, $b) { 
    return $a['id'] - $b['id']; 
} 
usort($array1, 'sortById'); 
print_r($array1); 
exit;