Question

我有这样的数组

[
  {
    "id": "2",
    "first_name": "hassan",
    "last_name": "hassani",
    "created": "0000-00-00 00:00:01",
  },
  {
    "id": "3",
    "first_name": "mohamad",
    "last_name": "mohamadi",
    "created": "0000-00-00 00:00:00", 
  }
]

我想将此数组转换为这样的数组

[
  {
    "first_name" : "hassan",
    "last_name" : "hassani",
  },
  {
    "first_name" : "mohamad",
    "last_name" : "mohamadi",
  }
]

我该怎么做？

谢谢您的回答

Answer 1

这将解决您的问题。您可以使用array_map（）函数迭代每个值。

Array
(
    [0] => Array
        (
            [first_name] => hassan
            [last_name] => hassani
        )
    [1] => Array
        (
            [first_name] => mohamad
            [last_name] => mohamadi
        )
)

输出：

{{1}}

Answer 2

您可以使用id和created键，使用array_map和unset从阵列中删除项目：

$result = array_map(function($x) {
    unset($x['id'], $x['created']);
    return $x;
}, $arrays);

这将导致：

Array
(
    [0] => Array
        (
            [first_name] => hassan
            [last_name] => hassani
        )

    [1] => Array
        (
            [first_name] => mohamad
            [last_name] => mohamadi
        )

)

Demo

Answer 3

您已经尝试过什么？我了解，当您（相对）不熟悉php和/或编程时，这些东西可能很难理解-我假设您是这样，否则应该真正删除此问题。

关于数组的一些good information，以及如何遍历它们。一探究竟！ W3C通常具有一些良好且易于理解的信息...

我将通过遍历数组并删除所有您不想保留的条目来解决这个问题-即不在您要保留的键数组中。或者，您可以通过指定需要删除的密钥来做到这一点。例如：

<?php
$array = [
  [
    "id" => "2",
    "first_name" => "hassan",
    "last_name" => "hassani",
    "created": "0000-00-00 00:00:01",
  ],
  [
    "id": "3",
    "first_name" => "mohamad",
    "last_name" => "mohamadi",
    "created" => "0000-00-00 00:00:00", 
  ]
]

$keepers = ["first_name", "last_name"]; // Make an array of keys we want to keep.

foreach ($array as $arr) { // Loop over the outer array 
  foreach ($arr as $key => $value){ // Loop over the inner array that actually holds the key=> value pairs.
    if (!in_array($key, $keepers)){ // Determine whether we want to keep this key.
      unset($arr[$key]) // This key is not in the $keepers-array, we'll go ahead and delete (i.e. unset) it.
    }
  }
}

Answer 4

有很多方法可以做到这一点，但这是我首先想到的。重新做阵列。我将在下面提供的方法将为您提供一个示例，说明如何在不覆盖当前数组的情况下执行此操作，以防日后需要时使用它。这种方法也很灵活。

<?php
$array = Array(); //you won't need this, let's just assume we're using the array from your original post

$newArray = Array(); //create a new array, this will have less values than the original

foreach ($array as $k=>$v){
    if ($k == "first_name" or $k == "last_name"){ //only add to array if the key is "first_name" or "last_name"
        $newArray[$k] = $v; //adds it to $newArray
    }
}
print_r($newArray);
?>

祝您好运！另外请注意，我没有测试此代码。

如何将阵列变成较小的阵列？在PHP中

4 个答案: