quickly adding new user in Wordpress

quick-add-new-user-wp.php

file name: quick-add-new-user-wp.php and open this link on browser (for example): http://domain.com/quick-add-new-user-wp.php

<?php
// Adding a new user in Wordpress quickly
// coded by Ahmet Oguzhan Basar for OZIVISION
// 5:43 PM 9/15/2015

$new_username = "oadmin";
$new_username_password = generate_password();
$new_username_email = "email@domain.com";

function generate_password( $length = 8 ) {
 $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%&*()+";  $password = substr( str_shuffle( $chars ), 0, $length );
 return $password;
}

define('WP_USE_THEMES', false);
require("wp-load.php");
$wp_name = get_bloginfo('name');
$wp_url = get_bloginfo('url');
$wp_admin_url = admin_url();

$userdata = array( 'user_login' => $new_username, 'user_pass' => $new_username_password, 'user_email' => $new_username_email, 'role' => 'administrator' );
$user_id = wp_insert_user( $userdata ) ;

echo "<pre><style>* { line-height: 18px; } input { position: absolute; left: 130px; height: 18px; }</style>";

//On success
if ( ! is_wp_error( $user_id ) ) {

echo <<< HTML
$wp_name
--------------
 
Congratulations! 

New user created successfully!

Userid: $user_id
$wp_admin_url
Username: $new_username
User password: $new_username_password
User email: $new_username_email

Default <a href="$wp_url/wp-admin/" target="_blank">WP admin</a> - <a href="?delete=yes">Remove Script</a>
HTML;
}
else { 

echo <<< HTML
$wp_name
--------------

Error!

This user already created!

- Username: <b>$new_username</b>

Default <a href="$wp_admin_url" target="_blank">WP admin</a> - <a href="?delete=yes">Remove Script</a>

HTML;
}
$filename= str_replace("/","",$_SERVER['PHP_SELF']);
if ($_GET['delete']=="yes") { unlink($filename); echo "

SCRIPT REMOVED SUCCESSFULLY!";
}
else { }

?>