查找與陣列相同的密鑰的所有項目，並在一個新的

Question

結合他們讓我們假設我們有一個多維數組象下面這樣：

$obj = array 
(
array("carName"=>"Volvo","carColor"=>"Red", "carSpeed"=> "100 mph"), 
array("carName"=>"Volvo","carColor"=>"Blue", "carSpeed"=> "100 mph"), 
array("carName"=>"BMW","carColor"=>"White", "carSpeed"=> "120 mph"), 
array("carName"=>"BMW","carColor"=>"Grey", "carSpeed"=> "120 mph") 
); 

我怎麼能在一個單一的陣列組合每"carName"的"carColor"所以我得到：

$newObj = array 
(
array("carName"=>"Volvo","carColor"=> array("Red", "Blue"), "carSpeed"=> "100 mph"), 
array("carName"=>"BMW","carColor"=> array("White", "Grey"), "carSpeed"=> "120 mph") 
); 

Answer 1

如果你的名字與車名的每個陣列（不知道的事項），你可以這樣來做

foreach($obj as $x=>$y){ 
$new[$y['carName']]['carName']=$y['carName']; 
$new[$y['carName']]['carColor'][]=$y['carColor']; 
$new[$y['carName']]['carSpeed']=$y['carSpeed']; 
}