(PHP 4, PHP 5, PHP 7, PHP 8)
imagecolorsforindex — Get the colors for an index
Gets the color for a specified index.
imageA GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
colorThe color index.
Returns an associative array with red, green, blue and alpha keys that contain the appropriate values for the specified color index.
| Version | Description |
|---|---|
| 8.0.0 |
image expects a GdImage
instance now; previously, a resource was expected.
|
| 8.0.0 |
imagecolorsforindex() now throws a ValueError exception
if color is out of range; previously, false was returned instead.
|
Example #1 imagecolorsforindex() example
<?php
// open an image
$im = imagecreatefrompng('nexen.png');
// get a color
$start_x = 40;
$start_y = 50;
$color_index = imagecolorat($im, $start_x, $start_y);
// make it human readable
$color_tran = imagecolorsforindex($im, $color_index);
// what is it ?
print_r($color_tran);
?>
The above example will output something similar to:
Array ( [red] => 226 [green] => 222 [blue] => 252 [alpha] => 0 )