PHP and image resize

[Anon]

I have an application that allows a user to select an image from their HD and add it to a webpage.

Is there a way (other than constraining the height and width sizes) to resize the image on the fly and have it look proportionally correct?

I know PHP can create and render images. Is this something that falls in that category?

Mark

[trippyd]

Yep, it is something that falls into the image manipulation functions of PHP, I suggest you RTFM on the image functions, specifically on getimagesize(), imagecopyresized(), and imagecreate(). Basically, you take the upload, get its current size and type from getimagesize, decide on the new size you want it to be, imagecreate a new image in that size, and imagecopyresized the uploaded image onto the new image, and save it to the server. Alacazam.

[chowdary]

Hi Mark,
You are right you need to use Image Functions to create New Image using the user uploaded Image.
Here are some issues in doing so
1.You should have GD library available
2.The latest versions of GD library does not support "GIF" functions so, you can't do any thing if the image uploaded is "GIF" file(You can check it on Clientside and don't allow user to upload "GIF" isn't it?)

[Anon]

Thanks -

I will investigate the GD Library.
Any good links that would give me more info?

Thanks

Mark