php PHP重命名多维数组中的数组键
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PHP rename array keys in multidimensional array
提问by stef
In an array such as the one below, how could I rename "fee_id" to "id"?
在如下数组中，如何将“fee_id”重命名为“id”？
Array
(
[0] => Array
(
[fee_id] => 15
[fee_amount] => 308.5
[year] => 2009
)
[1] => Array
(
[fee_id] => 14
[fee_amount] => 308.5
[year] => 2009
)
)
回答by lamas
foreach ( $array as $k=>$v )
{
$array[$k] ['id'] = $array[$k] ['fee_id'];
unset($array[$k]['fee_id']);
}
This should work
这应该工作
回答by Ruslan Novikov
You could use array_map() to do it.
你可以使用 array_map() 来做到这一点。
$myarray = array_map(function($tag) {
return array(
'id' => $tag['fee_id'],
'fee_amount' => $tag['fee_amount'],
'year' => $tag['year']
); }, $myarray);
回答by Niels Bom
$arrayNum = count($theArray);
for( $i = 0 ; $i < $arrayNum ; $i++ )
{
$fee_id_value = $theArray[$i]['fee_id'];
unset($theArray[$i]['fee_id']);
$theArray[$i]['id'] = $fee_id_value;
}
This should work.
这应该有效。
回答by TheGrandWazoo
Copy the current 'fee_id' value to a new key named 'id' and unset the previous key?
将当前的“fee_id”值复制到名为“id”的新键并取消设置前一个键？
foreach ($array as $arr)
{
$arr['id'] = $arr['fee_id'];
unset($arr['fee_id']);
}
There is no function builtin doing such thin afaik.
没有内置功能可以做这么薄的 afaik。
回答by smartmouse
This is the working solution, i tested it.
这是有效的解决方案，我对其进行了测试。
foreach ($myArray as &$arr) {
$arr['id'] = $arr['fee_id'];
unset($arr['fee_id']);
}
回答by GabeSullice
The snippet below will rename an associative array key while preserving order (sometimes... we must). You can substitute the new key's $value if you need to wholly replace an item.
下面的代码片段将重命名关联数组键，同时保留顺序（有时……我们必须这样做）。如果您需要完全替换一个项目，您可以替换新键的 $value。
$old_key = "key_to_replace";
$new_key = "my_new_key";
$intermediate_array = array();
while (list($key, $value) = each($original_array)) {
if ($key == $old_key) {
$intermediate_array[$new_key] = $value;
}
else {
$intermediate_array[$key] = $value;
}
}
$original_array = $intermediate_array;
回答by jaykishan
Converted 0->feild0, 1->field1,2->field2....
转换为 0->feild0, 1->field1,2->field2....
This is just one example in which i get comma separated value in string and convert it into multidimensional array and then using foreach loop i changed key value of array
这只是一个示例，其中我在字符串中获取逗号分隔值并将其转换为多维数组，然后使用 foreach 循环更改数组的键值
<?php
$str = "abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu;
echo '<pre>';
$arr1 = explode("\n", $str); // this will create multidimensional array from upper string
//print_r($arr1);
foreach ($arr1 as $key => $value) {
$arr2[] = explode(",", $value);
foreach ($arr2 as $key1 => $value1) {
$i =0;
foreach ($value1 as $key2 => $value2) {
$key3 = 'field'.$i;
$i++;
$value1[$key3] = $value2;
unset($value1[$key2]);
}
}
$arr3[] = $value1;
}
print_r($arr3);
?>
回答by Jo?o Rito Rodrigues
I wrote a function to do it using objects or arrays (single or multidimensional) see at https://github.com/joaorito/php_RenameKeys.
我编写了一个函数来使用对象或数组（单维或多维）来完成它，请参见https://github.com/joaorito/php_RenameKeys。
Bellow is a simple example, you can use a json feature combine with replace to do it.
Bellow 是一个简单的例子，你可以使用 json 特性结合替换来做到这一点。
// Your original array (single or multi)
$original = array(
'DataHora' => date('YmdHis'),
'Produto' => 'Produto 1',
'Preco' => 10.00,
'Quant' => 2);
// Your map of key to change
$map = array(
'DataHora' => 'Date',
'Produto' => 'Product',
'Preco' => 'Price',
'Quant' => 'Amount');
$temp_array = json_encode($original);
foreach ($map AS $k=>$v) {
$temp_array = str_ireplace('"'.$k.'":','"'.$v.'":', $temp);
}
$new_array = json_decode($temp, $array);
回答by Mahbub
Multidimentional array key can be changed dynamically by following function:
多维数组键可以通过以下函数动态更改：
function change_key(array $arr, $keySetOrCallBack = [])
{
$newArr = [];
foreach ($arr as $k => $v) {
if (is_callable($keySetOrCallBack)) {
$key = call_user_func_array($keySetOrCallBack, [$k, $v]);
} else {
$key = $keySetOrCallBack[$k] ?? $k;
}
$newArr[$key] = is_array($v) ? array_change_key($v, $keySetOrCallBack) : $v;
}
return $newArr;
}
Sample Example:
示例示例：
$sampleArray = [
'hello' => 'world',
'nested' => ['hello' => 'John']
];
//Change by difined key set
$outputArray = change_key($sampleArray, ['hello' => 'hi']);
//Output Array: ['hi' => 'world', 'nested' => ['hi' => 'John']];
//Change by callback
$outputArray = change_key($sampleArray, function($key, $value) {
return ucwords(key);
});
//Output Array: ['Hello' => 'world', 'Nested' => ['Hello' => 'John']];
回答by Antonio
I have been trying to solve this issue for a couple hours using recursive functions, but finally I realized that we don't need recursion at all. Below is my approach.
我一直在尝试使用递归函数解决这个问题几个小时，但最后我意识到我们根本不需要递归。下面是我的做法。
$search = array('key1','key2','key3');
$replace = array('newkey1','newkey2','newkey3');
$resArray = str_replace($search,$replace,json_encode($array));
$res = json_decode($resArray);
On this way we can avoid loop and recursion.
这样我们就可以避免循环和递归。
Hope It helps.
希望能帮助到你。
