Php 如何编辑数组'；钥匙是什么？

制作完密钥后，是否可以对其进行编辑

我知道你可以用不同的键创建一个数组，但是我在php网站上看不到任何关于编辑键的内容

原始阵列：

Array
(
    [0] => first
    [1] => color
)

我想要的是：

Array
(
    [newName] => first
    [1] => color
)

---

这几乎是唯一可以做的事情。

如果要更改项的键，必须使用新键和旧键设置值（此技术更改数组的顺序）：

或者使用放弃循环并允许您修改密钥的包装器，例如：

function array_change_key(&$array, $search, $replace) {
    $keys = array_keys($array);
    $values = array_values($array);

    // Return FALSE if replace key already exists
    if(array_search($replace, $keys) !== FALSE) return FALSE;

    // Return FALSE if search key doesn't exists
    $searchKey = array_search($search, $keys); 
    if($searchKey === FALSE) return FALSE;

    $keys[$searchKey] = $replace;
    $array = array_combine($keys, $values);

    return TRUE; // Swap complete
}

---

这里有一种替代的简单方法，只要您在一次调用中对每个数组执行所有的重新设置密钥，这种方法可能相当有效：

<?php
function mapKeys(array $arr, array $map) {
  //we'll build our new, rekeyed array here:
  $newArray = array();
  //iterate through the source array
  foreach($arr as $oldKey => $value) {
    //if the old key has been mapped to a new key, use the new one.  
    //Otherwise keep the old key
    $newKey = isset($map[$key]) ? $map[$key] : $oldKey;
    //add the value to the new array with the "new" key
    $newArray[$newKey] = $value;
  }
  return $newArray;
}

$arr = array('first', 'color');
$map = array(0 => 'newName');

print_r(mapKeys($arr, $map));

---

更改数组顺序的

。
function array_change_key(&$array, $search, $replace) {
    $keys = array_keys($array);
    $values = array_values($array);

    // Return FALSE if replace key already exists
    if(array_search($replace, $keys) !== FALSE) return FALSE;

    // Return FALSE if search key doesn't exists
    $searchKey = array_search($search, $keys); 
    if($searchKey === FALSE) return FALSE;

    $keys[$searchKey] = $replace;
    $array = array_combine($keys, $values);

    return TRUE; // Swap complete
}

<?php
function mapKeys(array $arr, array $map) {
  //we'll build our new, rekeyed array here:
  $newArray = array();
  //iterate through the source array
  foreach($arr as $oldKey => $value) {
    //if the old key has been mapped to a new key, use the new one.  
    //Otherwise keep the old key
    $newKey = isset($map[$key]) ? $map[$key] : $oldKey;
    //add the value to the new array with the "new" key
    $newArray[$newKey] = $value;
  }
  return $newArray;
}

$arr = array('first', 'color');
$map = array(0 => 'newName');

print_r(mapKeys($arr, $map));