PHP GD库 生成图片水印

* index.php

 'image/jpeg'
// 'mime' => 'image/png'

$a = explode('/', $info['mime']);
$type = array_pop($a);
unset($a);

$dstPath = "tmp.".$type;
call_user_func("image".$type, $dst, $dstPath);
// == 缩略图生成完了 ==

$dstW = $thumbWidth;
$dstH = $thumbHeight;
list($dstW, $dstH) = getimagesize($dstPath);

$src = imagecreatefromstring($dataSrc);

imagecopymerge($dst, $src,
    $dstW - $srcW, $dstH - $srcH,
    0, 0, $srcW, $srcH, 100);



call_user_func("image".$type, $dst, "out.".$type);

imagedestroy($src);
imagedestroy($dst);

* autoload.php

 
* ./lib/Image.php
 
 0) {
            $width  = $bigWidth * $per;
            $height = $bigHight * $per;
        }

        // 创建缩略图画板
        $block = imagecreatetruecolor($width, $height);

        // 启用混色模式
        imagealphablending($block, false);

        // 保存PNG alpha通道信息
        imagesavealpha($block, true);

        // 创建原图画板
        $bigImg = imagecreatefromstring($imagedata);

        // 缩放
        imagecopyresampled($block, $bigImg, 0, 0, 0, 0,
            $width, $height, $bigWidth, $bigHight);

        // 生成临时文件名
        $tmpFilename = tempnam(sys_get_temp_dir(), 'image_');

        // 保存
        switch ($bigType) {
            case 1: imagegif($block, $tmpFilename);
                break;

            case 2: imagejpeg($block, $tmpFilename);
                break;

            case 3: imagepng($block, $tmpFilename);
                break;
        }

        // 销毁
        imagedestroy($block);

        $image = file_get_contents($tmpFilename);

        unlink($tmpFilename);

        return $image;
    }
}
 
 
 
把国旗图片覆盖到目的图片右下角