imagecolorsforindex

(PHP 3, PHP 4, PHP 5)

imagecolorsforindex -- Get the colors for an index

Beskrivelse

array imagecolorsforindex ( resource image, int index )

Gets the color for a specified index.

Parameterliste

image

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

index

Returneringsværdier

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

Eksempler

Eksempel 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);

?>

Ovenstående eksempel vil udskrive noget der ligner:

Array
(
   [red] => 226
   [green] => 222
   [blue] => 252
   [alpha] => 0
)

Se også

imagecolorat()
imagecolorexact()