reset-wordpress-password-without-sql-manager.php

<?php
// Connect to mySQL First
$connection = mysql_connect( 'DB_HOST', 'DB_USER', 'DB_PASSWORD' );

// Select Database
mysql_select_db( 'DB_NAME' );
 
// Reset password with SQL UPDATE Query
$SQL = "UPDATE wp_users SET user_pass = MD5( 'newpassword123here') WHERE user_login = 'admin'";

// If everything is OK, your password will be reset
if( mysql_query( $SQL ) ) {
     echo "Your password was succesfully reset!";
}