Before you try to process the file, you need to make sure that your $err value is equivalent to _________
A
UPLOAD_ERR_OK
B
UPLOAD_NO_ERR
C
UPLOAD_ERR_NO_OK
D
UPLOAD_ERR
Correct Answer: UPLOAD_ERR_OK
When you’re dealing with files uploaded through an HTML form, you have access to a special constant called UPLOAD_ERR_OK that tells you whether a file uploaded successfully.