Wordpress admin-ajax results in Error 302 redirect

Question

I have customized a plugin to make some ajax calls to admin-ajax.php and it works great. I copied the code over to another site and it no longer works for users who are not logg

Answer 1

change condition to

!user_can($current_user->ID, 'administrator') && ( !user_can($current_user->ID, 'contributor') ) && !is_ajax()

add !is_ajax()

Answer 2

I had something similar occur in a theme. The original coder was trying to prevent a non-admin user from being able to see the /wp-admin/ area.

Here's an example:

// Block Access to /wp-admin for non admins.
function custom_blockusers_init() {
  if ( is_user_logged_in() && is_admin() && !current_user_can( 'administrator' ) ) {
    wp_redirect( home_url() );
    exit;
  }
}
add_action( 'init', 'custom_blockusers_init' ); // Hook into 'init'

I would check your theme for source code similar to what I have.

When you find the code, just add an extra conditional to make sure that a user isn't redirected if the DOING_AJAX constant is defined.

Answer 3

I know this is still a old question but you can have a look.

LETS DO THE CODE FASTER IF NOT INTERESTED ON EXPLANATION:

function redirect_non_admin_user(){
    if ( !defined( 'DOING_AJAX' ) && !current_user_can('administrator') ){
        wp_redirect( site_url() );  exit;
    } 
}


add_action( 'admin_init', 'redirect_non_admin_user' );

EXPLANATION: The reason for this problem is that either some of the installed plugins are redirecting the non admin users to homepage or any pages when they try to access wp-admin like http://localhost/project/wp-admin . So this causing the problems .

SO when you redirecting non admins from accessing admin ,you can use the following code.This will also work in admin ajax call in frontend.

Answer 4

I had the exact same problem and this worked for me:

function mt_redirect_admin() {

if ( ! current_user_can( 'manage_options' ) && ( ! defined( 'DOING_AJAX' ) || ! DOING_AJAX ) ) {
wp_redirect( site_url() ); 
exit;
}
}

add_action( 'admin_init', 'mt_redirect_admin', 1 );