I have an Advanced Custom Fields field group on Edit User pages (user-edit.php), containing an Image field (avatar). I aim to rename that uploaded filename to match the username of the on-page user.
My current code uses wp_handle_upload_prefilter to catch the upload, and, to ensure the rename does not happen to all WP file uploads, I think I need to check that the upload field in question is my specific ACF Image…
In the below code, (1) I can successfully get the ACF field key and field for this check (check not fully implemented)…
add_filter('wp_handle_upload_prefilter', 'custom_upload_filter' );
function custom_upload_filter( $file ) {
// 1. GET SOURCE FIELD, COPIED FROM ACF'S MEDIA.PHP
$field = false;
// Search for field key within available data.
// Case 1) Media modal query.
if ( isset( $_POST['query']['_acfuploader'] ) ) {
$field_key = (string) $_POST['query']['_acfuploader'];
// Case 2) Media modal upload.
} elseif ( isset( $_POST['_acfuploader'] ) ) {
$field_key = (string) $_POST['_acfuploader'];
}
// Attempt to load field.
// Note the `acf_get_field()` function will return false if not found.
if ( isset( $field_key ) ) {
$field = acf_get_field( $field_key );
}
// 2. GET USER'S ID AND USERNAME
// Code here
// 3. TEST RENAME CODE
$file['name'] = $user_id . 'and-everything-is-awesome-' . $file['name'];
return $file;
}
However, I’m struggling to (2) get the ID of the user on the user-edit.php page.
I have tried two methods found here on StackExchange…
1. wp_get_current_user…
This…
$user_id = (int) $user_id;
$current_user = wp_get_current_user();
if ( ! defined( 'IS_PROFILE_PAGE' ) )
define( 'IS_PROFILE_PAGE', ( $user_id == $current_user->ID ) );
if ( ! $user_id && IS_PROFILE_PAGE )
$user_id = $current_user->ID;
elseif ( ! $user_id && ! IS_PROFILE_PAGE )
wp_die(__( 'Invalid user ID.' ) );
elseif ( ! get_userdata( $user_id ) )
wp_die( __('Invalid user ID.') );
2. $_GET['user_id']
This…
// If is current user's profile (profile.php)
if ( defined('IS_PROFILE_PAGE') && IS_PROFILE_PAGE ) {
$user_id = get_current_user_id();
// If is another user's profile page
} elseif (! empty($_GET['user_id']) && is_numeric($_GET['user_id']) ) {
$user_id = $_GET['user_id'];
// Otherwise something is wrong.
} else {
die( 'No user id defined.' );
}
But neither result in a user_id being located. It is always PHP Notice: Undefined variable: user_id
Is this because, whilst the Edit User page is still at user-edit.php?user_id=2, the Media modal has somehow denied us the ability to get user_id?
TL;DR – I need to get user_id of currently-editing user on user-edit.php whilst in a Media picker initiated by ACF. How can I do this?
