how to store image in a folder and that path in Database using php but image is not coming from post functionality of html

how to store image in a folder and that path in Database using php but
image is not coming from post functionality of html

Here my Problem is:
Iphone developers sends me an image or .doc or .pdf or etc....files to me
to store in Database using services
So I directly tried to store them in Database but problem is if they send
me a file of 1MB then am unable to store it in Database due to its size so
i am thinking to save that uploaded file of iphone into a folder and save
that path in Database...
I know how to store the image in folder coming from post functionality but
am new to this functionality so can you help me to fix this problem......