(PHP 4, PHP 5)
imagecolorset — Set the color for the specified palette index
This sets the specified index in the palette to the specified color. This is useful for creating flood-fill-like effects in palleted images without the overhead of performing the actual flood-fill.
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
An index in the palette.
Value of red component.
Value of green component.
Value of blue component.
No value is returned.
Example #1 imagecolorset() example
<?php
// Create a 300x100 image
$im = imagecreate(300, 100);
// Set the background to be red
imagecolorallocate($im, 255, 0, 0);
// Get the color index for the background
$bg = imagecolorat($im, 0, 0);
// Set the backgrund to be blue
imagecolorset($im, $bg, 0, 0, 255);
// Output the image to the browser
//header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>