使用array_map使用PHP多维数组更改键 [英] Changing keys using array_map on multidimensional arrays using PHP

问题描述

我已经合并2多维数组用相同的信息，但使用 array_merge（）不同的键，我得到的输出：

I have merged 2 multidimensional arrays with the same info but with different keys using array_merge() and I get the output:

   Array
   (
    [0] => Array
    (
        [Ttitle] => lilly
        [Price] => 1.75
        [Number] => 3
    )
    [1] => Array
    (
        [Title] => rose
        [Price] => 1.25
        [Number] => 15
    )
    [2] => Array
    (
        [Title] => daisy
        [Price] => 0.75
        [Number] => 25
    )
    [3] => Array
    (
        [Title] => nettle
        [Price] => 2.75
        [Number] => 33
    )
    [4] => Array
    (
        [Title] => orchid
        [Price] => 1.15
        [Number] => 7
    )
  )

正如你所看到数组中的第一个关键名为 TTITLE ，剩下的就是标题。我现在想的是改变这一切 TTITLE 键（只是一个目前）为标题（像所有其他）。当我使用 array_map（）的功能，我设法改变所有的键标题，但我也全部删除<$除了 TTITLE 键C $ C>标题值我刚换到标题。

As you can see the first key name in the array is Ttitle and the rest is Title. What I want now is to change all Ttitle keys (just the one at the moment) to Title (like all the others). When I the use array_map() function I manage to change all the keys to Title but I also delete all Title values except for the Ttitle key I just changed to Title.

code是如下：

   if(! empty($notmatchingarray))
   {
    $completearray = array_merge($notmatchingarray, $datastuff2);

    $completearray = array_map(function($complete) {
        return array(
           'Title' => $complete['Ttitle'],
           'Price' => $complete['Price'],
           'Number' => $complete['Number'],
       );
}, $completearray);

echo "Array which includes each unique enrty from both arrays";
echo "<pre>";
print_r($completearray);
echo "</pre>";
echo "<br/>";
   }

这code的输出：

  Array
  (
  [0] => Array
    (
        [Title] => lilly
        [Price] => 1.75
        [Number] => 3
    )
  [1] => Array
    (
        [Title] => 
        [Price] => 1.25
        [Number] => 15
    )
  [2] => Array
    (
        [Title] => 
        [Price] => 0.75
        [Number] => 25
    )
  [3] => Array
    (
        [Title] => 
        [Price] => 2.75
        [Number] => 33
    )
  [4] => Array
    (
        [Title] => 
        [Price] => 1.15
        [Number] => 7
    )
  )

我在做错误的事情在使用本 array_map（）功能？我应该做比其他别的东西？

Am I doing the wrong thing in using this array_map() function? Should I be doing something else other than that?

推荐答案

更好的办法，但我领导了。与您现有的code你需要设置 TTITLE 或标题取其present：

Better ways but I'm headed out. With your existing code you need to set Ttitle or Title whichever is present:

$completearray = array_map(function($complete) {
        $title = isset($complete['Ttitle']) ? $complete['Ttitle'] : $complete['Title'];
        return array(
           'Title' => $title,
           'Price' => $complete['Price'],
           'Number' => $complete['Number'],
       );
}, $completearray);

三元运营商是一个简单的快捷键如果 / 其他，所以：

Ternary operator is a shortcut for a simple if / else, so:

if(isset($complete['Ttitle'])) {
    $title = $complete['Ttitle']; //if Ttitle is set use it
} else {
    $title = $complete['Title'];  //if not use Title
}

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