Hi ,i need to upload images in my project ,so i use this mkdir("/images') code for create folder, but i don't know where the folder is created in my project. i need to know that images folder location
mkdir is a server command so it will create the folder based on the path of the server. In your case /images will be created at the root of your server, not the root of your project.
When uploading files with Laravel, it will automatically create the correct directory for you. So in most cases, this is not needed.
If you want to create a directory in your project you should use this instead