The imagecolorat() function gets the index of the color of the pixel.
Syntax
imagecolorat( $img, $x, $y )
Parameters
img: Create an image with imagecreatetruecolor() function.
x: The x-coordinate of the point.
y: The y-coordinate of the point.
Return
The imagecolorat() function returns the color index or FALSE on failure.
Example
The following is an example:
<?php
$img = imagecreatefrompng("https://www.tutorialspoint.com/images/tp-logo-diamond.png");
$rgb = imagecolorat($img, 15, 25);
$colors = imagecolorsforindex($img, $rgb);
var_dump($colors);
?>Output
The following is the output:
array(4) { ["red"]=> int(255) ["green"]=> int(255) ["blue"]=> int(255) ["alpha"]=> int(127) }