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imagecolorsforindex

(PHP 3, PHP 4, PHP 5)

imagecolorsforindex -- Get the colors for an index

Descrizione

array imagecolorsforindex ( resource image, int index )

Gets the color for a specified index.

Elenco dei parametri

image

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

index

Valori restituiti

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

Esempi

Esempio 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);

?>

Il precedente esempio visualizzerà qualcosa simile a:

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

Vedere anche:

imagecolorat()
imagecolorexact()



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imagecolorsetRisaliimagecolorstotal