Php/docs/function.imagecolorresolve

From Get docs

imagecolorresolve

(PHP 4, PHP 5, PHP 7)

imagecolorresolveGet the index of the specified color or its closest possible alternative


Description

imagecolorresolve ( resource $image , int $red , int $green , int $blue ) : int

This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.

If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved.


Parameters

image
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
red
Value of red component.
green
Value of green component.
blue
Value of blue component.


Return Values

Returns a color index.


Examples

Example #1 Using imagecoloresolve() to get colors from an image

<?php// Load an image$im = imagecreatefromgif('phplogo.gif');// Get closest colors from the image$colors = array();$colors[] = imagecolorresolve($im, 255, 255, 255);$colors[] = imagecolorresolve($im, 0, 0, 200);// Outputprint_r($colors);imagedestroy($im);?>

The above example will output something similar to:


Array
(
    [0] => 89
    [1] => 85
)

See Also