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imagecolorexact

PHP function Edit on GitHub ✎

(PHP 4, PHP 5, PHP 7, PHP 8)

Get the index of the specified color

Description

imagecolorexact(GdImage $image, int $red, int $green, int $blue): int

Returns the index of the specified color in the palette of the image.

Colors

Parameters

red: Red
green: Green
blue: Blue

Return Values

Returns the index of the specified color in the palette, or -1 if the color does not exist.

Changelog

Version	Description

Examples

Get colors from the GD logo

php

<?php
// Setup an image
$im = imagecreatefrompng('./gdlogo.png');

$colors   = Array();
$colors[] = imagecolorexact($im, 255, 0, 0);
$colors[] = imagecolorexact($im, 0, 0, 0);
$colors[] = imagecolorexact($im, 255, 255, 255);
$colors[] = imagecolorexact($im, 100, 255, 52);

print_r($colors);
?>

The above example will output something similar to:

output

Array
(
    [0] => 16711680
    [1] => 0
    [2] => 16777215
    [3] => 6618932
)