Question

我正在尝试编写一个小的PHP函数来拍摄图像并在图像上应用水印类型图像并将它们保存为1个图像，此代码运行时出现0错误但不应用水印图像，是有什么明显的东西会说明为什么不会这样？

<?PHP
$source_file_path ='http://cache2.mycrib.net/images/image_group92/0/43/653807d5727a46498180e8ef57fdf7819b2b0c.jpg';
$watermark_image='fpwatermark.gif'; // the watermark image
$destination_image ='coooolgif.gif'; // where to save new file

$imagesize = getimagesize($destination_image);
$watermarksize = getimagesize($watermark_image);
$watermark_x = $imagesize[0] - $watermarksize[0] - 2;
$watermark_y = $imagesize[1] - $watermarksize[1] - 2;

//run function
watermark_img($watermark_image, $destination_image, $watermark_x, $watermark_y, $watermark_w, $watermarksize[0], $watermarksize[1], $source_file_path);


function watermark_img($watermark_src, $image_src, $watermark_x, $watermark_y, $watermark_w,$watermark_h, $source_file_path) {
    //Determine what type of image we're working with
    list($width, $height, $type) = getimagesize($image_src);
    $image_ext = $type;
    switch (strtolower($image_ext)) {
            #gif
        case 1:
            $image = imagecreatefromgif($image_src);
            break;
            #jpg
        case 2:
            $image = imagecreatefromjpeg($image_src);
            imageAlphaBlending($image, true);
            break;
            #png
        case 3:
            $image = imagecreatefrompng($image_src);
            imageAlphaBlending($image, true);
            break;
        default:
            return false;
    }
    //Create an instance of the watermark in memory
    if (!($watermark = imagecreatefromgif($watermark_src)))
        return false; //Make sure your Watermark is a GIF
    //Add watermark to the image
    if (!(imagecopy($image, $watermark, $watermark_x, $watermark_y, 0, 0, $watermark_w,
        $watermark_h)))
        return false;
    //Resave the image with the watermark now in place
    if (!(imagejpeg($image, $image_src)))
        return false;
    //Destroy instaces of images to free up RAM
    imagedestroy($image);
    imagedestroy($watermark);
    //Apparently everything went well.
    return $image_ext;
}
?>

Answer 1

我认为你需要改变它（这是一个简单的教程http://www.cafewebmaster.com/image-watermark-php）：

//Add watermark to the image
if (!(imagecopy($image, $watermark, $watermark_x, $watermark_y, 0, 0, $watermark_w,
    $watermark_h)))

使用：

//Add watermark to the image
if (!(imagecopymerge($image, $watermark, $watermark_x, $watermark_y, 0, 0, $watermark_w,
    $watermark_h, 100)))

或使用wideImage;）

Answer 2

以下是如何使用透明PNG图像从水印制作的教程：http://www.sitepoint.com/article/watermark-images-php/

我之前使用过它并且有效。您拥有的代码的问题可能是您正在尝试生成jpeg，但文件扩展名是gif，因此它无法正确呈现。可能是错的。

如果它只是没有保存最终图像，那么这只是文件夹的权限问题。在这种情况下，您很可能必须通过chmod将文件夹设置为777。

如何在PHP中将图像添加到图像上，如水印

2 个答案: