php，更改数组中的键？ [重复]

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Hi I have an array like below.

  $arr = Array ( [My_name] => Sam [My_location] => United_Kingdom [My_id] => 1 );

And im trying to change the keys from

  My_name, My_Location, My_id

  Your_name, Your_Location, Your_id

So the final array would look like

  Array ( [Your_name] => Sam [Your_location] => United_Kingdom [Your_id] => 1 );

I was hoping something like str_replace would work

   $arrnew = str_replace("My","Your",$arr);

But this is only replacing "My" to "Your" if "My" is a value, not a key.

So how would I change the keys?

Thanks for any help.

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$arrnew = array_combine(str_replace("My","Your",array_keys($arr)), $arr);

you cannot change the keys in-place but you can do something like this:

foreach($arr as $key => $value) {
    $arr[str_replace("My","Your",$key)] = $value;
    unset($arr[$key]);
}

This will add a new element with the new keys unsetting the old element

Hope this helps

You could try this:

foreach($arr as $key => $val){
    $newkey = str_replace("My","Your",$key);
    unset($arr[$key]);
    $arr[$newkey] = $val;
}