递归地从键中修剪特定字符 [英] Recursively left trim a specific character from keys

问题描述

我不能完全解决这个问题...

I can't quite work this out...

我希望会有一个默认的PHP函数来执行此操作，但是似乎没有。 t。我在网上找到的代码似乎不适用于我的情况，因为通常人们只需要修改数组值而不需要修改键。

I was hoping that there would be a default PHP function to do this, but it seems there isn't. The code I've found online seems to not really work for my situation, since often people have only need to the modify array values and not their keys.

我基本上需要一个递归函数，它将以'_'开头的每个键替换为没有该符号的相同键...。

I basically need a recursive function that replaces every key that starts with a '_' with the same key without that symbol....

这里有人使用过类似的东西吗？

Has anybody here used something similar before?

推荐答案

尝试一下：

function replaceKeys(array $input) {

    $return = array();
    foreach ($input as $key => $value) {
        if (strpos($key, '_') === 0)
            $key = substr($key, 1);

        if (is_array($value))
            $value = replaceKeys($value); 

        $return[$key] = $value;
    }
    return $return;
}

因此，此代码：

$arr = array('_name' => 'John', 
             'ages'  => array(
                  '_first' => 10, 
                  'last'   => 15));

print_r(replaceKeys($arr));

将产生（如键盘）：

Array
(
    [name] => John
    [ages] => Array
        (
            [first] => 10
            [last] => 15
        )

)

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