Rechercher une fonction PHP

imagecolorsforindex

Contents

(PHP 4, PHP 5, PHP 7)

imagecolorsforindex — Get the colors for an index

Description

imagecolorsforindex ( resource $image , int $index ) : array

Gets the color for a specified index.

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Parameters

image

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

index

The color index.

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Return Values

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

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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
)

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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