Hello, Hope you are doing well.
All requirements are clear. I will do as below;
1. dropdown menu work correctly,
2. full responsive and upload button works correctly,
3. upload function works correctly,
I have some questions for you.
1. which version of php did you use?
2. which frameworks did you use frontend, or only PHP, JS, HTML, CSS?
3. did you use bootstrap?
Why can you choose me?
I'm a PHP expert having rich experience in front and backend development.
As a web developer, I mastered special skills of PHP such as Knowledge of Ajax, jQuery, MySQL, APIs, Unix/Linux, and MVC Framework Architecture.
Also, I have more than 5 years of experience in Html/Html5, Css/Css3(Sass) , PHP, Bootstrap 3/4/5, JavaScript, modern design.
As you can see, I have awarded many times for delivering best quality work.
Now let's discuss more details in chat.