Very simple PHP thumbnail generation program source code

A very simple code program for generating thumbnails in PHP. the parameters and code can be simplified. if you are interested, you can try its functions. please correct me if there are any imperfections .? $ FILENAMEimage_name; width of the generated image $ RESIZEWIDTH400; generate a very simple PHP code program for generating thumbnails. the parameters and code are both streamlined, if you are interested, you can try its functions. if you are not perfect, please correct it.

$ FILENAME = "image_name "; // Generate the image width $ RESIZEWIDTH = 400; // Generate the image height $ RESIZEHEIGHT = 400; Function ResizeImage ($ im, $ maxwidth, $ maxheight, $ name ){ $ Width = imagesx ($ im ); $ Height = imagesy ($ im ); If ($ maxwidth & $ width> $ maxwidth) | ($ maxheight & $ height> $ maxheight )){ If ($ maxwidth & $ width> $ maxwidth ){ $ Widthratio = $ maxwidth/$ width; $ RESIZEWIDTH = true; } If ($ maxheight & $ height> $ maxheight ){ $ Heightratio = $ maxheight/$ height; $ RESIZEHEIGHT = true; } If ($ RESIZEWIDTH & $ RESIZEHEIGHT ){ If ($ widthratio <$ heightratio ){ $ Ratio = $ widthratio; } Else { $ Ratio = $ heightratio; } } Elseif ($ RESIZEWIDTH ){ $ Ratio = $ widthratio; } Elseif ($ RESIZEHEIGHT ){ $ Ratio = $ heightratio; } $ Newwidth = $ width * $ ratio; $ Newheight = $ height * $ ratio; If (function_exists ("imagecopyresampled ")){ $ Newim = imagecreatetruecolor ($ newwidth, $ newheight ); Imagecopyresampled ($ newim, $ im, 0, 0, 0, 0, $ newwidth, $ newheight, $ width, $ height ); } Else { $ Newim = imagecreate ($ newwidth, $ newheight ); Imagecopyresized ($ newim, $ im, 0, 0, 0, 0, $ newwidth, $ newheight, $ width, $ height ); } ImageJpeg ($ newim, $ name. ". jpg "); ImageDestroy ($ newim ); } Else { ImageJpeg ($ im, $ name. ". jpg "); } } If ($ _ FILES ['image'] ['size']) { If ($ _ FILES ['image'] ['type'] = "image/pjpeg "){ $ Im = imagecreatefromjpeg ($ _ FILES ['image'] ['tmp _ name']); } Elseif ($ _ FILES ['image'] ['type'] = "image/x-png "){ $ Im = imagecreatefrompng ($ _ FILES ['image'] ['tmp _ name']); } Elseif ($ _ FILES ['image'] ['type'] = "image/gif "){ $ Im = imagecreatefromgif ($ _ FILES ['image'] ['tmp _ name']); } If ($ im ){ If (file_exists ("your filename.jpg ")){ Unlink ("your filename.jpg "); } ResizeImage ($ im, $ RESIZEWIDTH, $ RESIZEHEIGHT, $ FILENAME); www ~ Phperz ~ Com ImageDestroy ($ im ); } } ?> ">