IMAGECOLORSET(3) 1 IMAGECOLORSET(3)
imagecolorset - Set the color for the specified palette index
SYNOPSIS
void imagecolorset (resource $image, int $index, int $red, int $green, int $blue, [int $alpha])
DESCRIPTION
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.
PARAMETERS
o $
image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).
o $index
- An index in the palette.
o $red
-Value of red component.
o $green
-Value of green component.
o $blue
-Value of blue component.
o $alpha
- Value of alpha component.
RETURN VALUES
No value is returned.
CHANGELOG
+--------+----------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+----------------------------------+
| 5.4.0 | |
| | |
| | The $alpha parameter was added. |
| | |
+--------+----------------------------------+
EXAMPLES
Example #1
imagecolorset(3) 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);
?>
SEE ALSO
imagecolorat(3).
PHP Documentation Group IMAGECOLORSET(3)
