   #PHP Manual Image functions imagecharup imagecolorallocatealpha

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                              imagecolorallocate

   (PHP 3, PHP 4 )
   imagecolorallocate -- Allocate a color for an image

Description

   int imagecolorallocate ( resource image, int red, int green, int blue)

   imagecolorallocate() returns a color identifier representing the color
   composed of the given RGB components. The image argument is the return
   from the imagecreate() function. red, green and blue are the values of
   the red, green and blue component of the requested color respectively.
   These parameters are integers between 0 and 255 or hexadecimals
   between 0x00 and 0xFF. imagecolorallocate() must be called to create
   each color that is to be used in the image represented by image.

     Note: The first call to imagecolorallocate() fills the background
     color.

   <?php
   // sets background to red
   $background = imagecolorallocate($im, 255, 0, 0);
   // sets some colors
   $white = imagecolorallocate($im, 255, 255, 255);
   $black = imagecolorallocate($im, 0, 0, 0);
   // hexadecimal way
   $white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
   $black = imagecolorallocate($im, 0x00, 0x00, 0x00);
   ?>

   Returns -1 if the allocation failed.

   See also imagecolorallocatealpha() and imagecolordeallocate().
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