Are you a WordPress developer and need to develop user-related features? This article will show you how to get the user ID in WordPress.
Contents
Search in WordPress admin page
This is a very simple method, but it also has some disadvantages.
First – you have to log in, second – you cannot get your own id.
- Login to your WordPress admin
- Go to Members > All Users
- Select and access a user’s profile
- Look at the page’s URL:
Current user, logged in
The way to get the current logged in user ID is to use the get_current_user_id() function .
$current_user_id = get_current_user_id();<div><span>1</span></div>
Or use the wp_get_current_user() function to get the current user’s object:
$current_user = wp_get_current_user(); $current_user_id = $current_user->ID; <div> <span>1</span><span>2</span> </div>
Since this function will return the object of the current user, you can use it to get email address, last name, first name, username, etc.
$current_user->user_email $current_user->first_name $current_user->last_name $current_user->user_login<div> <span>1</span><span>2</span><span>3</span><span>4</span> </div>
Based on user’s email address
To get the user ID based on the email address, you will have to use the get_user_by() function .
$the_user = get_user_by('email', 'misha@rudrastyh.com');
$the_user_id = $the_user->ID;
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Based on username (username)
In the example below, my username will be huykira. You also still use the get_user_by() function to get the user ID.
$the_user = get_user_by('login', 'huykira');
$the_user_id = $the_user->ID;
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In this case, you can get the user ID from the WP_Post object.
$my_post = get_post( $id ); // $id - Post ID echo $my_post->post_author; // print post author ID <div> <span>1</span><span>2</span> </div>
Get customer ID from order in WooCommerce
There are two different ways to do it, the first is to get the customer ID from the order:
$customer_id = get_post_meta( 541, '_customer_user', true); // 541 là ID đơn hàng<div><span>1</span></div>
The second way is with the help of the WC_Order object. This method will only work for WC 3.0+.
$order = wc_get_order( 541 ); // 541 là ID đơn hàng $customer_id = $order->get_customer_id(); <div> <span>1</span><span>2</span> </div>
Add User ID Column to WordPress User List Table
This is a very useful way to get user ID through WordPress admin. Finished Result: 
All you need to do is copy the following code into the functions.php file :
/*
* Adding the column
*/
function hk_user_id_column( $columns ) {
$columns['user_id'] = 'ID';
return $columns;
}
add_filter('manage_users_columns', 'hk_user_id_column');
/*
* Column content
*/
function hk_user_id_column_content($value, $column_name, $user_id) {
if ( 'user_id' == $column_name )
return $user_id;
return $value;
}
add_action('manage_users_custom_column', 'hk_user_id_column_content', 10, 3);
/*
* Column style (optional)
*/
function hk_user_id_column_style(){
echo '';
}
add_action('admin_head-users.php', 'hk_user_id_column_style');
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summary
This article is a collection of tips for you to work with user related functions. If everything works as expected, please comment and share this article.
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