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Get the colors for an index

imagecolorstotal

GD and Image Functions

imagecolorsforindex

(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: 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.

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

imagecolorstotal

GD and Image Functions