imagecolorset

imagecolorset

Set the color for the specified palette index

 **imagecolorset** GdImage $image int $color int $red int $green int $blue int $alpha

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.

colorAn index in the palette.

redgd.value.red

greengd.value.green

bluegd.value.blue

alphaValue of alpha component.

The function returns null on success, return.falseforfailure.

Voorbeeld: 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 background to be blue
imagecolorset($im, $bg, 0, 0, 255);

// Output the image to the browser
header('Content-Type: image/png');

imagepng($im);
?>

imagecolorat