imagecolorsforindex
(PHP 4, PHP 5, PHP 7, PHP 8)
imagecolorsforindex — Get the colors for an index
Description
Gets the color for a specified index.
Parameters
-
image -
A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
-
color -
The color index.
Return Values
Returns an associative array with red, green, blue and alpha keys that contain the appropriate values for the specified color index.
Changelog
| 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.
|
Examples
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 )
See Also
- imagecolorat() - Get the index of the color of a pixel
- imagecolorexact() - Get the index of the specified color
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