Users uploading pictures to my site.

thePHP

Hi let me start by saying i am a newbie, i am not familiar with coding, i have just hired a tutor on the side so im learning...

Right now i have someone coding a pretty complex real estate listing site..

Here is what my existing coder did...

If you upload a picture lets say a .bmp that is 1.6mb is size.. it leaves the file this size and then when you are doing a search if you right click and save the thumbnail the size of the file is 1.6mb

So this leads me to believe that there is not two directories, one for original image and one for resized thumbnail like there should be.

Here is the question...

Lets say a user uploads a .png or .bmp, etc is there any way to have the file automatically be reformatted to a .jpg just under 100kb?

Then from that new under 100kb .jpg can it resize it so the new .jpg image creates thumbnail around 30kb?

Immediately as i uploaded pictures i saw load time was hurt bad so i need to change this.

I am going to go back to the developer and tell him we need two directories something like this:

abc.com/images/large/picture1.jpg (main picture directory)

abc.com/images/thumbnails.picture1.jpg (thumbnail)

Also, if a user uploads a .jpg or .gif it should just leave it the way it is BUT still make a smaller file size thumbnail, how should this be executed?

I included a picture hopefully it will help make things alittle more clear.

thank you and i appreciate the help.

dagon

yes this the common way to do it, if you google 'resize image php' there are lots of resources.

johanafm

Although 30kB thumbnails... yikes!

As for handling bitmaps, gd didn't do that the last time I used gd, which is a few years ago. But, you should be able to find php code which enables you to deal with bitmaps to create gd objects. A search for "php imagecreatefrombmp" might do the trick.

Weedpacket

An alternative to GD Lib is the [man]Imagick[/man] extension. It's much more complex than necessary for this task (GD Lib is designed to provide basic mechanisms), but it does support a much wider range of formats (including BMP; although uploading BMP files is a bit silly to begin with).

PS: unless it's animated, there's not much call for GIF when PNG does a better job.

thePHP

johanafm Although 30kB thumbnails... yikes!

are you saying these are small or big?

these two thumbnails are about...
16kb and 28kb

what do you think i think theyre great.. good quality and load real fast.

dagon

large for a thumbnail, half that is more common.

Weedpacket

You'll be able to reduce them a fair bit without any loss of quality if you take out all the embedded metadata that says, e.g., that pasrterrazen003.jpg was snapped in May of 2009 with flash and a focal length of 6.6mm by a Fujifilm A610 (which appears to have been an upgrade on the Kodak C140 used for the other photo taken a year earlier). Most people won't care about that information.

Indeed, pasrterrazen003.jpg itself has an embedded thumbnail:
http://img692.imageshack.us/img692/1113/thumbtrm.jpg

If you remove all the fluff, both of those thumbnails have a combined size of 10.4kB.