例如，我們現在有兩個二維陣列：

第一個二維陣列：$first = array("0"=>array("a"=>'1',"b"=>2,"c"=>"3"),"1"=>array("a"=>'4',"b"=>5,"c"=>"6"),"2"=>array("a"=>'7',"b"=>8,"c"=>"9"))

第二個二維陣列：$second = array("0"=>array("d"=>'1',"e"=>2,"f"=>"3"),"1"=>array("d"=>'4',"e"=>5,"f"=>"6"),"2"=>array("d"=>'7',"e"=>8,"f"=>"9"))

通過array_merge函式，我們可以合併兩個二維數組合併為一個，一維陣列的鍵從0-5;

我們希望實現合併後的陣列一維陣列的鍵不會增加，原兩個陣列相同鍵的資料會合並，實現方法如：

$count = count($first);//獲取陣列的數量

下面是重點：通過迴圈將原兩個陣列相同鍵的資料合併：

for($i=0;$i<$count;$i++){
$all[$i] = array_merge($first[$i],$second[$i]);
}

我們會發現，var_dump($all)後，會發現新的二維陣列結構如下：$all = array(

"0"=>array("a"=>'1',"b"=>2,"c"=>"3"

"1"=>array("a"=>'4',"b"=>5,"c"=>"6","d"=>'4',"e"=>'5',"f"=>"6"),

"2"=>array("a"=>'7',"b"=>8,"c"=>"9","d"=>'7',"e"=>'8',"f"=>"9")

)