How to change dpi of image from 72 to 300 ?

Dear All,

I want to make image from 72 dpi to 300 dpi with PHP. So do you know which function or how to do that.
Please guide me urgently.

Thanking you,

Dhaval Dave

If you are wanting to resize an image from web page resolution to printing resolution, then this approach will not work.

The resulting image will be too pixelated.

You need to have a seperate print version of the image.

You can use Photoshop or Paintshop Pro, but you will get a smaller image.

Dear Geoff,

You are 100% right. But I want to do that only with PHP, JScript. I can't used any 3rd partys' software like PhotoShop or any else.

Because user will create online cards. After finished he will click on a PROOF checkbox. Then he will save file in a 300 dpi. Sys admin or any one can't make single (minor) modification in image, once it is checked as a PROOF.

Pl guide me more. Once again thanks for your prompt reply.


Snowby

Your latest post sounds like you want to go from 300 to 72, not the other way around as you first said.

If this is the case, then that is a different ball game and there are functions in php which will let you resize an image, control resolution, etc.

Confirm which way you want to go.