Limit number of posts an user can create in WordPress admin panel

functions.php

<?php
/*
* If you, by any chance, want to limit the number of posts an user can create in your multi author WordPress blog, there is a nice way to do it. Add the following code in your theme’s functions.php file
*/

add_action("load-post-new.php","limit_user_by_post_count");
function limit_user_by_post_count(){
    $user = get_current_user_id();
    if (!current_user_can( 'manage_options')) { 
        //not an admin - so impose the limit
        $user_post_count = count_user_posts($user);
        if($user_post_count>=10)
            header("Location: /wp-admin/edit.php");
    }
}

/*
* In this example, if the user has 10 posts he/she can not create a new post anymore. Every time he clicks on the “New Post” menu, he will be redirected to 'All Posts' page. But the 'admin' will not be limited at all :)
*/

@yasko88 i was posted this long back. After that, I am not working with WordPress.

Please check with this author: https://hasin.me/2013/10/25/limit-number-of-posts-an-user-can-create-in-wordpress-admin-panel/