从foreach值创建嵌套关联数组

Question

I'm trying to create associative nested array from foreach values, but not sure how to get it in desired format, as right now associative array is getting wrapped with numeric one.

I understand it's because shouldn't use array() to wrap values, but not sure how to do it right.

$arr=array();

foreach ($all_users as $val) {
   $arr[] = array( $val->data->user_nicename => array(
    'username'=> $val->data->display_name,
    'avatar_url' => get_avatar_url($val->ID)
    )
    );
}

print_f($arr);

Getting array result like this:

Array
(
   [0] => Array
       (
           [john_s] => Array
               (
                [username] => John Smith
                [avatar_url] => https://secure.gravatar.com
            )

    )

[1] => Array
    (
        [sarah_s] => Array
            (
                [username] => Sarah Smith
                [avatar_url] => https://secure.gravatar.com
            )

    )
)

While desired format is this:

Array
(
    [john_s] => Array
        (
            [username] => John Smith
            [avatar_url] => https://secure.gravatar.com
        )
    [sarah_s] => Array
        (
            [username] => Sarah Smith
            [avatar_url] => https://secure.gravatar.com
        )
)

Answer 1

You are nesting one level too deep:

<?php
$arr=array();

foreach ($all_users as $val) {

    // Use $val->data->user_nicename as the index to build an associative array of the other data
    // This assumes that user_nicename is unique throughout the loop
    // If you have multiple users with the same user_nicename then some data can get "lost"
    $arr[$val->data->user_nicename] = array(
        'username'=> $val->data->display_name,
        'avatar_url' => get_avatar_url($val->ID)
    );
}