PHP. Руководство по PHP. 2005
imagecolorexact
imagecolorexact
Description
int imagecolorexact (resource image, int red, int green, int blue)Returns the index of the specified color in the palette of the image.
If the color does not exist in the image's palette, -1 is returned.
If you created the image from a file, only colors used in the image are resolved. Colors present only in the pallete are not resolved.
See also imagecolorclosest().
imagecolordeallocate
imagecolorexactalpha
