Detect main colors in an image with PHP

Here's exactly what you're looking for in PHP: https://github.com/thephpleague/color-extractor

Example :

use League\ColorExtractor\Palette;$palette = Palette::fromFilename('some/image.png');$topEightColors = $palette->getMostUsedColors(8);

This is my simple method to get the main color of an image

$image=imagecreatefromjpeg('image.jpg');$thumb=imagecreatetruecolor(1,1);imagecopyresampled($thumb,$image,0,0,0,0,1,1,imagesx($image),imagesy($image));$mainColor=strtoupper(dechex(imagecolorat($thumb,0,0)));echo $mainColor;

You need to scale down the picture and you will get the main colors of the picture. If you need 4 colors in the pallet, scale it down to about 8x8, 6 colors to about 12x8 and so on...

imagecopyresized for scaled down image then check every pixels and store them in array imagecolorat($image,px,py)

Try this out

<?php// EXAMPLE PICTURE$url='https://www.nordoff-robbins.org.uk/sites/default/files/google.jpg';//var_dump(getColorPallet($url));echoColors(getColorPallet($url));function echoColors($pallet){ // OUTPUT COLORSBAR    foreach ($pallet as $key=>$val)        echo '<div style="display:inline-block;width:50px;height:20px;background:#'.$val.'"> </div>';}function getColorPallet($imageURL, $palletSize=[16,8]){ // GET PALLET FROM IMAGE PLAY WITH INPUT PALLET SIZE    // SIMPLE CHECK INPUT VALUES    if(!$imageURL) return false;    // IN THIS EXEMPLE WE CREATE PALLET FROM JPG IMAGE    $img = imagecreatefromjpeg($imageURL);    // SCALE DOWN IMAGE    $imgSizes=getimagesize($imageURL);    $resizedImg=imagecreatetruecolor($palletSize[0],$palletSize[1]);    imagecopyresized($resizedImg, $img , 0, 0 , 0, 0, $palletSize[0], $palletSize[1], $imgSizes[0], $imgSizes[1]);    imagedestroy($img);    //CHECK IMAGE    /*header("Content-type: image/png");    imagepng($resizedImg);    die();*/    //GET COLORS IN ARRAY    $colors=[];    for($i=0;$i<$palletSize[1];$i++)        for($j=0;$j<$palletSize[0];$j++)            $colors[]=dechex(imagecolorat($resizedImg,$j,$i));    imagedestroy($resizedImg);    //REMOVE DUPLICATES    $colors= array_unique($colors);    return $colors;}?>

Works perfect for me.