imagecolorat — Obtains the color at a specific point
in an image.
int imagecolorat(image, x,
int image: Image
int x: X coordinate
int y: Y coordinate
Creates a new color based on the color value at the
specified x and y coordinates. If using imagecreatefromgif() , this
is an ideal way to determine and use colors in the base
Example 394. Make the
background color transparent
// creates a transparent image
$im = imagecreatefrompng("test_image.png");
$bg_color = imagecolorat($im, 1, 1);
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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