script.php

<?php
function getColor() {
return mt_rand(0,255);
}

function c1(&$c, $rand) {
    if($c['red'] <= 30 && $c['green'] >= 230 && $c['blue'] >= 220){
        $c['red'] = $rand[0];
        $c['green'] = $rand[1];
        $c['blue'] = $rand[2];
    }

    if($c['red'] <= 30 && $c['green'] >= 230 && $c['blue'] <= 30){
        $c['red'] = $rand[0] * 0.8;
        $c['green'] = $rand[1] * 0.8;
        $c['blue'] = $rand[2] * 0.8;
    }
}


function c2(&$c, $rand) {
    if($c['red'] >= 240 && $c['green'] >= 240 && $c['blue'] <= 10){
        $c['red'] = $rand[0];
        $c['green'] = $rand[1];
        $c['blue'] = $rand[2];
    }
    if($c['red'] >= 240 && $c['green'] <= 10 && $c['blue'] <= 10){
        $c['red'] = $rand[0] * 0.6;
        $c['green'] = $rand[1] * 0.6;
        $c['blue'] = $rand[2] * 0.6;
    }
}


function c3(&$c, $rand) {
    if ($c['red'] <= 30 && $c['green'] >= 230 && $c['blue'] >= 220) {
        $c['red'] = $rand[0];
        $c['green'] = $rand[1];
        $c['blue'] = $rand[2];
    }
    if ($c['red'] <= 30 && $c['green'] >= 230 && $c['blue'] <= 30) {
        $c['red'] = $rand[0] * 0.8;
        $c['green'] = $rand[1] * 0.8;
        $c['blue'] = $rand[2] * 0.8;
    }
    if ($c['red'] >= 240 && $c['green'] >= 240 && $c['blue'] <= 10) {
        $c['red'] = $rand[0] * 0.6;
        $c['green'] = $rand[1] * 0.6;
        $c['blue'] = $rand[2] * 0.6;
    }
    if ($c['red'] >= 240 && $c['green'] <= 10 && $c['blue'] <= 10) {
        $c['red'] = $rand[0] * 0.4;
        $c['green'] = $rand[1] * 0.4;
        $c['blue'] = $rand[2] * 0.4;
    }
}

$path='i/' . microtime(1).'.png';

$h = 388; $w = 344;

$canvas = imagecreatetruecolor($w,$h);

$randNum = mt_rand(1,4);
$img_src = 'https://svinooohenzo.ru/script/img/soboken'.$randNum.'.jpg';

$image = imagecreatefromjpeg($img_src);

$rand1 = [getColor(), getColor(), getColor()];
$rand2 = [getColor(), getColor(), getColor()];

$i=0;

for($y=0; $y<$h; $y++){
    for($x=0; $x<$w; $x++){
        if ($i%5 === 0){
            $irand = mt_rand(0,2);
            $rand1[$irand] = min($rand1[$irand] * 1.00011, 255);
            $rand2[$irand] = min($rand2[$irand] * 1.00011, 255);
        }

        $index = imagecolorat($image, $x,$y);
        $data = imagecolorsforindex($image, $index);

        c1($data, $rand1);
        c2($data, $rand2);
        c3($data, $rand1);

        $color = imagecolorallocatealpha($canvas, $data['red'], $data['green'], $data['blue'], $data['alpha']);
        imagesetpixel($canvas, $x,$y, $color);
        $i++;
    }
}

header('Content-Type: image/png');

imagepng($canvas, $path, 9);

readfile($path);

imagedestroy($canvas);
imagedestroy($image);