PHP重命名一个数组的钥匙 [英] PHP rename the keys of an array

问题描述

我怎么能在一个阵列命名的键？

开始与这阵名为$ start_array，

  [0] =＆GT;
      [日期] =＆GT; 2012-05-01
      [收] =＆GT; 100
[1] =＆GT;
      [日期] =＆GT; 2012-05-02
      [收] =＆GT; 200
 

和更改日期和收入的钥匙，所以你得到这个$ final_array：

  [0] =＆GT;
      [X] =＆GT; 2012-05-01
      [Y] =＆GT; 100
[1] =＆GT;
      [X] =＆GT; 2012-05-02
      [Y] =＆GT; 200
 

下面是我这工作，但凌乱的可怕的尝试。

  $ final_array =阵列（）;
$最大=计数（$ start_array）;
为（$ J = 0; $ J＆LT; $最大; $ J ++）{
  $ final_array [] =阵列（'X'=＆GT; $ start_array [$ J] ['dateid']，'Y'=＆GT; $ start_array [$ J] ['ctrl_version_revenue']）;
}
 

解决方案

 的foreach（$ start_array为＆放大器; $ ARR）{
  $常用3 [X] = $改编['日期'];
  未设置（$改编['日期']）;
  $常用3 ['Y'] = $改编['收入'];
  未设置（$改编['收入']）;
}
未设置（$ ARR）;
 

试试上面的code。

How can I rename keys in an array?

Start with this array named $start_array,

[0] => 
      [date] => 2012-05-01
      [revenue] => 100
[1] =>
      [date] => 2012-05-02
      [revenue] => 200

and change the keys for 'date' and 'revenue' so you get this $final_array:

[0] => 
      [x] => 2012-05-01
      [y] => 100
[1] =>
      [x] => 2012-05-02
      [y] => 200

Here is my terrible attempt which works but is messy.

$final_array = array();
$max = count($start_array);
for ($j = 0; $j < $max; $j++) {
  $final_array[] = array('x' => $start_array[$j]['dateid'], 'y' => $start_array[$j]['ctrl_version_revenue'] );
}

解决方案

foreach( $start_array as &$arr ) {
  $arr["x"] = $arr['date'];
  unset( $arr['date'] );
  $arr['y'] = $arr['revenue'];
  unset( $arr['revenue'] );
}
unset($arr);

Try the above code.

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