[PHP] Using PHP to convert to JPEG

[Jason Paschal]

I'm building a site that allows ppl to upload images.  PHP was compiled with 
the GD lib so I'm able to verify all sorts of info about the image for 
validation.  However, I was wondering if there is a way to convert a 
non-jpeg image to jpeg just by using the GD functions as opposed to using 
unix command line utilities and system/exec functions (the hosting company 
doesn't like that, and personally, i don't like the 'cross ur fingers' 
aspect of php/commandline stuff).
Some browsers don't like some image types and we're trying to make jpg the 
standard extension, though we allow ppl to upload BMP, TIF, GIF, PNG, and 
JPG files.
I can get the image and put it where I want on the server, but is there a 
way to finesse the GD lib to create a jpeg from whatever image type they 
upload?  If someone just has an idea that may or may not work, I'm open to 
suggestions, pseudo-code is welcome.  Seems that somewhere in the GD lib's 
capabilities there's a way to squeeze out what i want, but I can't grasp it.
Thank you,
screamingpanda





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