[php] image uploads - how to secure?

ok ive created a basic file upload script that checks the mime type that the brower has sent but this is not secure as a user can upload an image that is a .vbs rename to .jpg (the allowed type) and then run this script somehow on the server.

Is there is away I can use php to verify the file is infact an image?

Obviously I don't want to upload files into a public directory and want each image called first via the secure script how would you recommend doing this?

ANy advice appreciated. I'm still new to php [php] image uploads - how to secure?

 

 

 

 

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