เปลี่ยนสีรูปภาพโดยใช้ php และ่ jquery color picker

Demo
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<?php

if (empty($_GET['red'])){
    $_GET['red'] = 0;
}
if (empty($_GET['green'])){
    $_GET['green'] = 0;
}
if (empty($_GET['blue'])){
    $_GET['blue'] = 0;
}

// Setup an image
$im = imagecreatetruecolor(372, 268);

$src1 = @imagecreatefromjpeg('shoe.jpg');
imagecopymerge($im, $src1, 0, 0, 0, 0, 372, 268, 100);

// Apply the overlay alpha blending flag
imagelayereffect($im, IMG_EFFECT_OVERLAY);

$src2 = @imagecreatefrompng('shoe2.png');
$red = imagecolorallocate($im, $_GET['red'], $_GET['green'], $_GET['blue']);
imagefill($src2, 33, 81, $red);
imagefill($src2, 157, 109, $red);
imagecopymerge($im, $src2, 0, 0, 0, 0, 372, 268, 100);

// Output
header('Content-type: image/png');

imagepng($im);
imagedestroy($im);

?>