php使用GD库将图片圆角 解决背景变黑问题 以及 图片丢失问题

if (!function_exists('gene_poster')) {

    function gene_poster($param)
    {
        $user = User::where(['id' => $param['user_id']])->find();
        $link = "http://".$_SERVER['SERVER_NAME'] . '/index/user/register/pid/' . $user['id'];
      /*  echo '<pre>';
        print_r($link);
        exit;*/
        $background = $param['background'];
        $nickname = $user['nickname'];
        $mobile = $user['mobile'];
        $avatar = $user['avatar'];

        $path = "../public/uploads/" . date('Ymd') . "/qrcode/";
        $poster_path = "../public/uploads/" . date('Ymd') . "/poster/";

        if (!is_dir($path)) {
            mkdir($path, 0777, true);
        }

        if (!is_dir($poster_path)) {
            mkdir($poster_path, 0777, true);
        }

        if (!$user['qrcode']) {
            /*1生成二维码存储*/
            $qr = new EndroidQrCodeQrCode();
            $qr_code_img = $qr->setText($link)
                ->setSize(300)
                ->setPadding(10)
                ->setErrorCorrection('high')
                ->setForegroundColor(array('r' => 0, 'g' => 0, 'b' => 0, 'a' => 0))
                ->setBackgroundColor(array('r' => 255, 'g' => 255, 'b' => 255, 'a' => 0))
                ->setLabel('')
                ->setLabelFontSize(16)
                ->setImageType(EndroidQrCodeQrCode::IMAGE_TYPE_PNG);


            //$path = "";


            $qrcode_file_name = $path . date('YmdHis') . $param['user_id'] . ".png";
            $re = $qr_code_img->save($qrcode_file_name);
            User::where(['id' => $param['user_id']])->update(['qrcode' => $qrcode_file_name]);
        } else {
            $qrcode_file_name = $user['qrcode'];
        }

        $font_path = '../public/assets/fonts/captcha.ttf';
        $font_path = 'D:WORKprojectkangaroocollegepublicassetsfontsfangzhengheitijianti.TTF';
        /*echo '<pre>';
        print_r(is_file($font_path));
        exit;*/

        /*2画图 保存*/
        $config = array(
            'text' => array(
                array(
                    'text' => $nickname,
                    'left' => 350,
                    'top' => 2050,
                    'fontPath' => $font_path,     //字体文件
                    'fontSize' => 50,             //字号
                    'fontColor' => '255,255,255',       //字体颜色
                    'angle' => 0,
                ),

                array(
                    'text' => $mobile,
                    'left' => 350,
                    'top' => 2150,
                    'fontPath' => $font_path,     //字体文件
                    'fontSize' => 50,             //字号
                    'fontColor' => '255,255,255',       //字体颜色
                    'angle' => 0,
                ),

                array(
                    'text' => '我是你的专属客服',
                    'left' => 160,
                    'top' => 2250,
                    'fontPath' => $font_path,     //字体文件
                    'fontSize' => 60,             //字号
                    'fontColor' => '255,255,255',       //字体颜色
                    'angle' => 0,
                ),
                array(
                    'text' => '可向我咨询',
                    'left' => 160,
                    'top' => 2350,
                    'fontPath' => $font_path,     //字体文件
                    'fontSize' => 60,             //字号
                    'fontColor' => '255,255,255',       //字体颜色
                    'angle' => 0,
                )
            ),
            'image' => array(
                array(
                   // 'url' => $avatar,       //图片资源路径
                    'url' => border_radius($avatar),       //图片资源路径
                    'left' => 160,
                    'top' => 2000,
                    'stream' => 0,             //图片资源是否是字符串图像流
                    'right' => 0,
                    'bottom' => 0,
                    'width' => 150,
                    'height' => 150,
                    'opacity' => 100
                ),
                array(
                    'url' => $qrcode_file_name,
                    'left' => 900,
                    'top' => 2000,
                    'right' => 0,
                    'stream' => 0,
                    'bottom' => 0,
                    'width' => 400,
                    'height' => 400,
                    'opacity' => 100
                ),

            ),
            'background' => $background,
        );
        $post_file_name = $poster_path . date('YmdHis') . $param['user_id'] . ".png";;
//echo createPoster($config,$filename);
        return createPoster($config, $post_file_name);

    }
}

/**
 * 生成宣传海报
 * @param array  参数,包括图片和文字
 * @param string $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片
 * @return bool|string [type] [description]
 */
function createPoster($config = array(), $filename = "")
{
//    echo '<pre>';
//    print_r($config);
//  //  print_r($config['background']);
//    exit;
    //如果要看报什么错，可以先注释调这个header
    //if (empty($filename)) header("content-type: image/png");
    $imageDefault = array(
        'left' => 0,
        'top' => 0,
        'right' => 0,
        'bottom' => 0,
        'width' => 100,
        'height' => 100,
        'opacity' => 100
    );
    $textDefault = array(
        'text' => '',
        'left' => 0,
        'top' => 0,
        'fontSize' => 32,       //字号
        'fontColor' => '255,255,255', //字体颜色
        'angle' => 0,
    );
    $background = $config['background'];//海报最底层得背景
    //背景方法
    $backgroundInfo = getimagesize($background);
    $backgroundFun = 'imagecreatefrom' . image_type_to_extension($backgroundInfo[2], false);
    $background = $backgroundFun($background);
    $backgroundWidth = imagesx($background);  //背景宽度
    $backgroundHeight = imagesy($background);  //背景高度
    $imageRes = imageCreatetruecolor($backgroundWidth, $backgroundHeight);
    $color = imagecolorallocate($imageRes, 0, 0, 0);
    imagefill($imageRes, 0, 0, $color);
    // imageColorTransparent($imageRes, $color);  //颜色透明
    imagecopyresampled($imageRes, $background, 0, 0, 0, 0, imagesx($background), imagesy($background), imagesx($background), imagesy($background));
    //处理了图片
    if (!empty($config['image'])) {
        foreach ($config['image'] as $key => $val) {
            $val = array_merge($imageDefault, $val);
            $info = getimagesize($val['url']);
            $function = 'imagecreatefrom' . image_type_to_extension($info[2], false);
            if ($val['stream']) {   //如果传的是字符串图像流
                $info = getimagesizefromstring($val['url']);
                $function = 'imagecreatefromstring';
            }
            $res = $function($val['url']);
            $resWidth = $info[0];
            $resHeight = $info[1];

            //建立画板 ，缩放图片至指定尺寸
            $canvas = imagecreatetruecolor($val['width'], $val['height']);
            imagefill($canvas, 0, 0, $color);

            /*echo '<pre>';
            print_r(1);
            exit;*/
            /* --- 用以处理缩放png图透明背景变黑色问题 开始 --- */
            if($key == 0){
                $color = imagecolorallocatealpha($canvas,255,255,255,127);
                imagecolortransparent($canvas,$color);
                imagefill($canvas,0,0,$color);
            }
            /* --- 用以处理缩放png图透明背景变黑色问题 结束 --- */


            //关键函数，参数（目标资源，源，目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h）
            imagecopyresampled($canvas, $res, 0, 0, 0, 0, $val['width'], $val['height'], $resWidth, $resHeight);
            $val['left'] = $val['left'] < 0 ? $backgroundWidth - abs($val['left']) - $val['width'] : $val['left'];
            $val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) - $val['height'] : $val['top'];

            //放置图像
            imagecopymerge($imageRes, $canvas, $val['left'], $val['top'], $val['right'], $val['bottom'], $val['width'], $val['height'], $val['opacity']);//左，上，右，下，宽度，高度，透明度
        }
    }
    //处理文字
    if (!empty($config['text'])) {
        foreach ($config['text'] as $key => $val) {
            $val = array_merge($textDefault, $val);
            list($R, $G, $B) = explode(',', $val['fontColor']);
            $fontColor = imagecolorallocate($imageRes, $R, $G, $B);
            $val['left'] = $val['left'] < 0 ? $backgroundWidth - abs($val['left']) : $val['left'];
            $val['top'] = $val['top'] < 0 ? $backgroundHeight - abs($val['top']) : $val['top'];

//            echo '<pre>';
//            print_r($val['fontPath']);
//            print_r(is_file($val['fontPath']));
//            exit;

            imagettftext($imageRes, $val['fontSize'], $val['angle'], $val['left'], $val['top'], $fontColor, $val['fontPath'], $val['text']);
        }
    }

    //这一句一定要有
    imagealphablending( $imageRes,false );

    imagesavealpha($imageRes, true);
    //生成图片
    if (!empty($filename)) {
        $res = imagepng($imageRes, $filename, 5); //保存到本地
        imagedestroy($imageRes);
        if (!$res) return false;
        return $filename;
    } else {
        imagejpeg($imageRes);     //在浏览器上显示
        imagedestroy($imageRes);
    }
}

/**
 *图片修圆角
 */
function border_radius($imgpath)
{
    $ext = pathinfo($imgpath);
   /* echo '<pre>';
    print_r($ext);
    exit;*/
    $src_img = null;
    if(isset($ext['extension'])){
        switch ($ext['extension']) {
            case 'jpg':
                $src_img = imagecreatefromjpeg($imgpath);
                break;
            case 'png':
                $src_img = imagecreatefrompng($imgpath);
                break;

        }
    }else{
        $src_img = imagecreatefromjpeg($imgpath);
    }

    $wh = getimagesize($imgpath);
    $w = $wh[0];
    $h = $wh[1];
    $w = min($w, $h);
    $h = $w;
    $img = imagecreatetruecolor($w, $h);
    //这一句一定要有
    imagealphablending( $img,false );

    imagesavealpha($img, true);
    //拾取一个完全透明的颜色,最后一个参数127为全透明
    $bg = imagecolorallocatealpha($img, 255, 255, 255, 127);
    imagefill($img, 0, 0, $bg);
    $r = $w / 2; //圆半径
    $y_x = $r; //圆心X坐标
    $y_y = $r; //圆心Y坐标
    for ($x = 0; $x < $w; $x++) {
        for ($y = 0; $y < $h; $y++) {
            $rgbColor = imagecolorat($src_img, $x, $y);
            if (((($x - $r) * ($x - $r) + ($y - $r) * ($y - $r)) < ($r * $r))) {
                imagesetpixel($img, $x, $y, $rgbColor);
            }
        }
    }

    $avatar_path = "../public/uploads/" . date('Ymd') . "/avatar/";


    if (!is_dir($avatar_path)) {
        mkdir($avatar_path, 0777, true);
    }
//    echo '<pre>';
//    print_r($img);
//    exit;
  //  file_put_contents($avatar_path.'avatar'.date('Ymd').".jpg",$img);
    $filename = $avatar_path.'avatar'.date('Ymd').".png";
    header("content-type:image/png");
    imagepng($img, $filename, 5); //保存到本地
  /*  imagepng($img);
    imagedestroy($img);
    exit;*/
    return $filename;
}