   #PHP Manual Image functions imagecopyresampled imagecreate

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                               imagecopyresized

   (PHP 3, PHP 4 )
   imagecopyresized -- Copy and resize part of an image

Description

   int imagecopyresized ( resource dst_im, resource src_im, int dstX, int
   dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH)

   imagecopyresized() copies a rectangular portion of one image to
   another image. Dst_im is the destination image, src_im is the source
   image identifier. If the source and destination coordinates and width
   and heights differ, appropriate stretching or shrinking of the image
   fragment will be performed. The coordinates refer to the upper left
   corner. This function can be used to copy regions within the same
   image (if dst_im is the same as src_im) but if the regions overlap the
   results will be unpredictable.

     Note: There is a problem due to palette image limitations (255+1
     colors). Resampling or filtering an image commonly needs more
     colors than 255, a kind of approximation is used to calculate the
     new resampled pixel and its color. With a palette image we try to
     allocate a new color, if that failed, we choose the closest (in
     theory) computed color. This is not always the closest visual
     color. That may produce a weird result, like blank (or visually
     blank) images. To skip this problem, please use a truecolor image
     as a destination image, such as one created by
     imagecreatetruecolor().

   See also imagecopyresampled().
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