Question

我有这个数组，我必须根据他们的id替换值。以下是Original Array：

 [
  0 => [
    "id" => "70"
    "color" => "red"  
  ]
  1 => [
    "id" => "65"
    "color" => "blue"
  ]
  2 => [
    "id" => "66"
    "color" => "black"
  ]
  3 => [
    "id" => "73"
    "color" => "red"
  ]  
]

这是我需要插入并替换原始数组中具有相同id的数组的数组：

  0 => [
    "id" => "65"
    "color" => "white"  
  ]
  1 => [
    "id" => "66"
    "color" => "gold"
  ] 
]

我想要实现的是这样的：

     [
  0 => [
    "id" => "70"
    "color" => "red"  
  ]
  1 => [
    "id" => "65"
    "color" => "white"
  ]
  2 => [
    "id" => "66"
    "color" => "gold"
  ]
  3 => [
    "id" => "73"
    "color" => "red"
  ]  
]

Answer 1

试试这段代码：

<?php
$original = [
  0 => [
    "id" => "70",
    "color" => "red"  ,
  ],
  1 => [
    "id" => "65",
    "color" => "blue",
  ],
  2 => [
    "id" => "66",
    "color" => "black",
  ],
  3 => [
    "id" => "73",
    "color" => "red",
  ]  
];

$toReplace =   [0 => [
    "id" => "65",
    "color" => "white"  ,
  ],
  1 => [
    "id" => "66",
    "color" => "gold",
  ] 
];

function getColorByKey($key, $toReplace)
{
    $result = null;
    foreach($toReplace as $k => $value)
    {
        if($value['id'] == $key)
            $result = $value['color'];
    }

    return $result;

}


foreach($original as $key => $value)
{
   $newColor = getColorByKey($value['id'], $toReplace);
    $original[$key]['color'] = $newColor !== null ? $newColor : $original[$key]['color'];
}

var_dump($original);

var_dump的输出：

array(4) {
  [0]=>
  array(2) {
    ["id"]=>
    string(2) "70"
    ["color"]=>
    string(3) "red"
  }
  [1]=>
  array(2) {
    ["id"]=>
    string(2) "65"
    ["color"]=>
    string(5) "white"
  }
  [2]=>
  array(2) {
    ["id"]=>
    string(2) "66"
    ["color"]=>
    string(4) "gold"
  }
  [3]=>
  array(2) {
    ["id"]=>
    string(2) "73"
    ["color"]=>
    string(3) "red"
  }
}

在getColorByKey($key, $toReplace)循环中使用了一个函数foreach，其中$key为id索引，而$toReplace是您的第二个数组。

Answer 2

使用array_column和array_walk函数的简单解决方案：

// $arr1 is the original array
// $arr2 is the replacing array

$colours = array_column($arr2, "color", "id");

array_walk($arr1, function(&$v) use($colours){
    if (array_key_exists($v["id"],$colours)) {
        $v["color"] = $colours[$v["id"]];
    }
});

print_r($arr1);

输出：

Array
(
    [0] => Array
        (
            [id] => 70
            [color] => red
        )

    [1] => Array
        (
            [id] => 65
            [color] => white
        )

    [2] => Array
        (
            [id] => 66
            [color] => gold
        )

    [3] => Array
        (
            [id] => 73
            [color] => red
        )
)

http://php.net/manual/ru/function.array-column.php

http://php.net/manual/ru/function.array-walk.php

Answer 3

// $array1 = original array
// $array2 = second array

foreach ($array1 as $key1 => $value) 
{
    $new[$value['id']] = $key1;
}

foreach ($array2 as $value) 
{
    if (array_key_exists($value['id'], $new))
    {
        $key2 = $new[$value['id']];
        $array1[$key2]['color'] = $value['color'];
    }
    else
    {
        $array1[] = array('id' => $value['id'], 'color' => $value['color']);
        // if this color not present, then it adds this to the original array 
    }
}

echo '<pre>'; print_r($array1);

输出：

Array
(
    [0] => Array
        (
            [id] => 70
            [color] => red
        )

    [1] => Array
        (
            [id] => 65
            [color] => white
        )

    [2] => Array
        (
            [id] => 66
            [color] => gold
        )

    [3] => Array
        (
            [id] => 73
            [color] => red
        )

)

替换具有相同键值

3 个答案: