Image processing in PHP

Danesh_D

Hi all,

I have web site which allows users to upload JPEG images into a folder but some times the uploaded image is too large to fit in a frame so it is pressed or when it is too small it is streched in the frame. In these cases the quality of image decreases dramatically. Is there any way in PHP to resize the image without loosing quality to desired dimensions automatically after it is uploaded? It would be also perfect if there is any function to add logo of my site to the corner of image automatically after it is uploaded, but it not mais issue for now.

Regards,

NogDog

If the GD library is enabled in your PHP installation, there are all sorts of fun image functions you can play with. imagecopyresampled is the function you want to use for better quality resized images.

cahva

Check out the GD image functions in the manual. Other way is to use imagemagick if the server has one installed.

Theres plenty of examples in those funtions to resize images.
When resizing with gd, make sure to use imageCopyResampled() function. Thats the best for resizing. When you are saving the resized image with imageJpeg() function, you can set the compression(quality) in that function.

Theres also examples how to insert watermark to images in some of those comments in there...

Danesh_D

Thank you all! Your help was great. My problem is solved now.