Totally block all access to Wp-Admin and Wp-Login.php Pages from non admins

I want to Block all access to Wp-Admin and Wp-Login.php Pages from all members who are not site Admins.

And I don’t want to use any plugin for this.

The flow is that, even if people deliberately type “mydomain.com/wp-admin” or they deliberately type “mydomain.com/wp-login.php” , it should immediately and instantly redirect them to the Login or Register Pages that I have created– and they should never see the “wp- admin or “wp-login.php” Page.

I have this Code:

//Redirect WP Login Page
add_filter( 'login_url', 'my_login_page', 10, 3 );
function my_login_page( $login_url, $redirect, $force_reauth ) {
    return home_url( '/my-login-page/?redirect_to=' . $redirect );
}

It works in a way that, if you try to access “mydomain.com/wp-admin“, it functions well and redirects you to my specified Login Page.

But if you deliberately type “mydomain.com/wp-login.php“, it still loads the wp-login.php Page.

This means that my code is still insufficient to block access to Wp-Admin and Wp-Login.php Pages.

Then I applied this second code:

unction custom_login_redirect() {
    // Check if the current URL contains "/wp-admin" or "/wp-login.php"
    if (strpos($_SERVER['REQUEST_URI'], '/wp-admin') !== false || strpos($_SERVER['REQUEST_URI'], '/wp-login.php') !== false) {
        // Redirect to your custom login or registration page
        wp_redirect(home_url('/your-custom-login-page')); // Replace with the actual URL of your custom login page
        exit();
    }
}
add_action('init', 'custom_login_redirect');

This code works. But it works in a very terrible way.

I am logged in, before I inserted the code. The page slug I want users directed to, is the “my-account” Page.

When I click Logout, it doesn’t log me out. It continues to keep me fixed and Logged in, inside the “My-Account” Page.

2.) When I first inserted it through functions.php, it told me that it couldn’t find a way to check with server.

See the message and error report here— https://prnt.sc/NRJy0NgPtZWz

from all indications, it is clear that I have 2 Code snippets, but they don’t function well.

Please, anyone with a better PHP Code Snippet that can help me totally block all access to wp-admin and wp-login.php together?

Regards.