在PHP中将第二个带圆角的图像合并为第二个

Question

我正在尝试制作带有圆角的第二张图片。一个完美的圆圈将是完美的。我尝试了这个Merge two images and round corner in PHP，但我无法使其发挥作用。我还在最终图像上添加了一些文字。

$numberOfImages = 2;
$background = imagecreatetruecolor(900, 900);

$firstUrl = '1.png';
// THIS IS THE ONE I WANT IN CIRCLE
$secondUrl = '2.jpeg';
$outputImage = $background;

$first = imagecreatefrompng($firstUrl);
$second = imagecreatefromjpeg($secondUrl);

imagecopymerge($outputImage,$first,0,0,0,0, 900, 900,100);
imagecopymerge($outputImage,$second,350,50,0,0, 200, 200,100);

// ADD TEXT
$white = imagecolorallocate($outputImage, 255, 255, 255);
$font_path = 'SOME_FONT';
$text = 'This is my test';
imagettftext($outputImage, 90, 0, 250, 700, $white, $font_path, $text);

// I SAVE IT 
imagejpeg('test.jpg');
imagedestroy($outputImage);

编辑： 我得到了答案的开头。我用一只手拿着裁剪的照片，另一只手拿着我的合并图像（没有裁剪）：

class CircleCrop
{

    private $src_img;
    private $src_w;
    private $src_h;
    private $dst_img;
    private $dst_w;
    private $dst_h;

    public function __construct($img)
    {
        $this->src_img = $img;
        $this->src_w = imagesx($img);
        $this->src_h = imagesy($img);
        $this->dst_w = imagesx($img);
        $this->dst_h = imagesy($img);
    }

    public function __destruct()
    {
        if (is_resource($this->dst_img))
        {
            imagedestroy($this->dst_img);
        }
    }

    public function display()
    {
        header("Content-type: image/png");
        imagepng($this->dst_img);
        return $this;
    }

    public function reset()
    {
        if (is_resource(($this->dst_img)))
        {
            imagedestroy($this->dst_img);
        }
        $this->dst_img = imagecreatetruecolor($this->dst_w, $this->dst_h);
        imagecopy($this->dst_img, $this->src_img, 0, 0, 0, 0, $this->dst_w, $this->dst_h);
        return $this;
    }

    public function size($dstWidth, $dstHeight)
    {
        $this->dst_w = $dstWidth;
        $this->dst_h = $dstHeight;
        return $this->reset();
    }

    public function crop()
    {
        // Intializes destination image
        $this->reset();

        // Create a black image with a transparent ellipse, and merge with destination
        $mask = imagecreatetruecolor($this->dst_w, $this->dst_h);
        $maskTransparent = imagecolorallocate($mask, 255, 0, 255);
        imagecolortransparent($mask, $maskTransparent);
        imagefilledellipse($mask, $this->dst_w / 2, $this->dst_h / 2, $this->dst_w, $this->dst_h, $maskTransparent);
        imagecopymerge($this->dst_img, $mask, 0, 0, 0, 0, $this->dst_w, $this->dst_h, 100);

        // Fill each corners of destination image with transparency
        $dstTransparent = imagecolorallocate($this->dst_img, 255, 0, 255);
        imagefill($this->dst_img, 0, 0, $dstTransparent);
        imagefill($this->dst_img, $this->dst_w - 1, 0, $dstTransparent);
        imagefill($this->dst_img, 0, $this->dst_h - 1, $dstTransparent);
        imagefill($this->dst_img, $this->dst_w - 1, $this->dst_h - 1, $dstTransparent);
        imagecolortransparent($this->dst_img, $dstTransparent);

        return $this;
    }
}

$url = 'http://orig09.deviantart.net/a6b6/f/2011/200/f/e/transparente_by_eliseoeli-d40zcu1.png';
$img = imagecreatefrompng($url);
$crop = new CircleCrop($img);
$crop->crop()->display();


$background = imagecreatetruecolor(900, 900);
$firstUrl = 'http://img15.deviantart.net/498a/i/2012/263/3/a/background_for_fantastic_five_by_pastel_bunbun-d5fdwdb.png';
$secondUrl = 'http://orig09.deviantart.net/a6b6/f/2011/200/f/e/transparente_by_eliseoeli-d40zcu1.png';
$outputImage = $background;
$first = imagecreatefrompng($firstUrl);
$second = imagecreatefrompng($secondUrl);
imagecopymerge($outputImage,$first,0,0,0,0, 900, 900,100);
imagecopymerge($outputImage,$second,350,50,0,0, 200, 200,100);
imagejpeg($outputImage, 'test2.jpg');
imagedestroy($outputImage);