我希望你能帮助我......我有 2 个数组，我想插入到 1array 中，new_date如果没有datais data= '0'，如果没有data1is data1= '0'。
对不起，如果我不知道如何解释好，我举了一个小例子。我已经尝试过 array_merge （但一切都是分开的）和 array_combine （它给出了两个参数应该具有相同数量的元素的错误）。预先感谢您提供的所有帮助...
array1 = array:5 [▼
0 => array:2 [▼
"data" => 118
"new_date" => "06-2017"
]
1 => array:2 [▼
"data" => 263
"new_date" => "07-2017"
]
2 => array:2 [▼
"data" => 264
"new_date" => "08-2017"
]
3 => array:2 [▼
"data" => 266
"new_date" => "09-2017"
]
4 => array:2 [▼
"data" => 306
"new_date" => "10-2017"
]
5 => array:2 [▼
"data" => 100
"new_date" => "11-2017"
]array2 = array:6 [▼
0 => array:2 [▼
"data1" => 100
"new_date" => "02-2016"
]
1 => array:2 [▼
"data1" => 170
"new_date" => "06-2017"
]
2 => array:2 [▼
"data1" => 354
"new_date" => "07-2017"
]
3 => array:2 [▼
"data1" => 397
"new_date" => "08-2017"
]
4 => array:2 [▼
"data1" => 421
"new_date" => "09-2017"
]
5 => array:2 [▼
"data1" => 531
"new_date" => "10-2017"
]例子：
array3 = array:7 [▼
0 => array:3 [▼
"data1" => 111
"data" => 0
"new_date" => "02-2016"
]
1 => array:3 [▼
"data1" => 170
"data" => 118
"new_date" => "06-2017"
]
2 => array:3 [▼
"data1" => 354
"data" => 263
"new_date" => "07-2017"
]
3 => array:3 [▼
"data1" => 397
"data" => 264
"new_date" => "08-2017"
]
4 => array:3 [▼
"data1" => 421
"data" => 266
"new_date" => "09-2017"
]
5 => array:3 [▼
"data1" => 531
"data" => 306
"new_date" => "10-2017"
]
6 => array:3 [▼
"data1" => 0
"data" => 100
"new_date" => "11-2017"
]使用array_combine设置new_date为关键字。然后添加第一个数组元素d1（在您的示例中为“data1”）与array_map. 很好，在第二个数组上循环并添加d1存在，其余所有d（在您的示例中为“数据”）为 0 如果不存在。
你可以这样做：
$a1 = array(["d"=>1, "new_date"=> "06-2017"],["d"=>2, "new_date"=> "02-2016"]);
$a2 = array(["d1"=>3, "new_date"=> "06-2017"],["d1"=>4, "new_date"=> "07-2017"]);
$a1 = array_combine(array_column($a1, "new_date"), $a1);
$a2 = array_combine(array_column($a2, "new_date"), $a2);
// adding default d1 as 0
$a1 = array_map(function ($e) {return array_merge($e, ["d1" => 0]);},$a1);
foreach($a2 as $k => $v) {
if (isset($a1[$k]))
$a1[$k]["d1"] = $v["d1"]; // if new_data exist set only d1
else
$a1[$k] = array_merge($v, ["d" => 0]); //add with d as 0
}
你的结果将在 $a1
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我来说两句