只有管​​理员允许访问wp-admin和登录？

Question

I would like to do that only administrator(role) allow to login with wp-admin not any other role, other uses like(editor,author) are login from front end and it's working fine but i would like only administrator can login through wp-admin.

I have used ultimate member plug in for front end login. Ultimate Plugin link

also i have used below code for access wp-admin only for administrator(role) but it's not working.

<?php
function restrict_admin(){
//if not administrator, kill WordPress execution and provide a message
   if( !current_user_can('administrator') ) {
        wp_die( __('You are not allowed to access this part of the site') );
    }
}
add_action( 'admin_init', 'restrict_admin', 1 );
?>

Answer 1

Thank you guys for your help, I am answering my own question hope this will help others too.

I have referred this link https://developer.wordpress.org/reference/functions/wp_authenticate/

I have solved this with hook wp_authenticate

 add_action( 'wp_authenticate' , 'check_custom_authentication' );
  function check_custom_authentication ( $username ) {

    $username;
     $user = new WP_User($username);
     $user_role_member=$user->roles[0];



    if($user_role_member == 'author' || $user_role_member == 'editor'){
        session_destroy();
        wp_redirect( home_url() );
        exit;
    }

 }

Answer 2

add_action( 'admin_init', 'redirect_none_admin' );

function redirect_none_admin(){

 if(is_admin() && current_user_can(activate_plugins)){
    //...
 }else{
     wp_redirect(home_url());
 }
}

i tested this one and it worked i think it is simple and easy you can find Roles and Capabilities here

Answer 3

Try this

add_action( 'admin_init', 'redirect_non_admin_users' );
/**
 * Redirect non-admin users to home page
 *
 * This function is attached to the 'admin_init' action hook.
 */
function redirect_non_admin_users() {
    if ( is_admin() !== false) {
        wp_redirect( home_url() );
        exit;
    }
}

Answer 4

If anyone will need the same here is code that allows only administrators, authors and editors to login using /wp-login.php

//------------- This website is read only - so only staff can log in  -------------
add_filter( 'authenticate', 'myplugin_auth_signon', 30, 3 );
function myplugin_auth_signon( $user, $username, $password ) {
    $user_role_member=$user->roles[0];
    if(!in_array($user_role_member,array('administrator','author','editor'))){
         wp_logout();
         return new WP_Error( 'broke', __( "This website is read only for regular users", "your_wp_domain_name" ) );
        exit;
    }else{
        return $user;   
    }
}
//------------- this website is read only - so staff can log in  ------------------

You can add\\remove roles in the array above array('administrator','author','editor')