PHP - 获取嵌套数组的KEY

I have an array called $plugins that looks something like this :

Array
(
    [path/to/file.php] => Array
        (
            [Name] => somevalue_a
            [TextDomain] => somevalue_b
            [value_c] => somevalue_c
            [value_d] => somevalue_d
            ...
            ...
            ..

        )
    [path/to/file2.php] => Array
        (
            [Name] => somevalue_a
            [TextDomain] => somevalue_b
            [value_c] => somevalue_c
            [value_d] => somevalue_d
            ...
            ...
            ..
        )
)

Now, I am having trouble to get the KEY name (which is path)of each array element ..

function get_plugin_data(){

    foreach ($plugins as $plugin => $data) {
    $plugin_data = $plugins[$plugin];

    // Start simple DEBUG
    echo '</br>===============================</br>' ;
    echo '</br><b>Plugin Name : </b>'. $data[Name]; .'</br>' ;
    echo '</br><b>Plugin Path : </b>'. key($plugins)   .'</br>' ; // <-- Problem here
    echo '</br>TextDomain set  : '. $data[TextDomain] .'</br>' ;
    echo '</br>===============================</br>' ;
    // End DEBUG
    }
}

When using key($plugins) it gives me always the same value (first one). When using key($data) it is giving me the FIRST LETTER only.. (??)

How can I get the this key of each nested array ?

just return $plugin, not key($plugin). $plugin should already be the key.

to elaborate, when you use the syntax:

foreach ($plugins as $plugin => $data)

it is setting $plugin to the key, and $data to it's value.

Your foreach loop indicates that the path are available as $plugin. Use that

   foreach ($plugins as $plugin => $data) {
                      // ^ This represents the key of the array item
    $plugin_data = $plugins[$plugin];

    // Start simple DEBUG
    echo '</br>===============================</br>' ;
    echo '</br><b>Plugin Name : </b>'. $data[Name]; .'</br>' ;
    echo '</br><b>Plugin Path : </b>'. $plugin .'</br>' ; // <-- Problem here
    echo '</br>TextDomain set  : '. $data[TextDomain] .'</br>' ;
    echo '</br>===============================</br>' ;
    // End DEBUG
   }

Check this modification to your code, it works now.

<?php
    $plugins = Array
    (
        'array1' => Array
            (
                'name' => 'somevalue_a',
                'TextDomain' => 'somevalue_b',
                'value_c' => 'somevalue_c',
                'value_d' => 'somevalue_d'

            ),
        'array2' => Array
            (
                'name' => 'somevalue_a',
                'TextDomain' => 'somevalue_b',
                'value_c' => 'somevalue_c',
                'value_d' => 'somevalue_d'

            )
    );

    function get_plugin_data($plugins){

        foreach ($plugins as $plugin => $data) {
        $plugin_data = $plugins[$plugin];

        // Start simple DEBUG
        echo '</br>===============================</br>' ;
        echo '</br><b>Plugin Name : </b>'. $data['name'] .'</br>' ;
        echo '</br><b>Plugin Path : </b>'. key($plugins)   .'</br>' ; // <-- Problem here
        echo '</br>TextDomain set  : '. $data['TextDomain'] .'</br>' ;
        echo '</br>===============================</br>' ;
        // End DEBUG
        }
    }
    get_plugin_data($plugins);
    //print_r($plugins);
?>