PHP Manual: imagecolorsforindex

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imagecolorsforindex

(PHP 3, PHP 4, PHP 5)

imagecolorsforindex -- Get the colors for an index

Description

array imagecolorsforindex ( resource image, int index )

Gets the color for a specified index.

Parameters

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
index

Return Values

Returns an associative array with red, green, blue and alpha keys that contain the appropriate values for the specified color index.

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
)