2013-03-21 108 views
1

我使用这个功能,创造由用户上传的图像的缩略图,我发现在这里:http://webcheatsheet.com/php/create_thumbnail_images.phpPHP createThumbnail功能故障排除

function createThumbs($pathToImages, $pathToThumbs, $thumbWidth) 
{ 
    // open the directory 
    $dir = opendir($pathToImages); 

// loop through it, looking for any/all JPG files: 
if (false !== ($fname = readdir($dir))) { 
    // parse path for the extension 
    $info = pathinfo($pathToImages . $fname); 

// continue only if this is a JPEG image 
if (strtolower($info['extension']) == 'jpg') 
{ 
    echo "Creating thumbnail for {$fname} <br />"; 

    // load image and get image size 
    $img = imagecreatefromjpeg("{$pathToImages}{$fname}"); 
    $width = imagesx($img); 
    $height = imagesy($img); 

    // calculate thumbnail size 
    $new_width = $thumbWidth; 
    $new_height = floor($height * ($thumbWidth/$width)); 

    // create a new temporary image 
    $tmp_img = imagecreatetruecolor($new_width, $new_height); 

    // copy and resize old image into new image 
imagecopyresampled($tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height); 

    // save thumbnail into a file 
    imagejpeg($tmp_img, "{$pathToThumbs}{$fname}"); 
} 
} 
// close the directory 
closedir($dir); 
} 

此功能工作正常,不正是我希望它,但尽管如此,我仍然从中得到了错误。请参阅下面的错误:

Warning: opendir(images/008/01/0000288988r.jpg,images/008/01/0000288988r.jpg) [<a href='function.opendir'>function.opendir</a>]: The directory name is invalid. (code: 267)

Warning: opendir(images/008/01/0000288988r.jpg) [<a href='function.opendir'>function.opendir</a>]: failed to open dir: No error

Warning: readdir() expects parameter 1 to be resource, boolean given

的问题,我想,是我传递一个实际的文件,而不只是一个目录中,将参数的函数。这是$pathtoimages$pathtothumbs的情况。该功能应该搜索传递给它的目录以查找扩展名为.jpg的所有图像。但我只想在上传时上传的一张图片上执行该功能。有没有办法编辑这个功能来允许这个?

在此先感谢

回答

1
function createThumbs($pathToImages, $pathToThumbs, $thumbWidth) 
{ 

// load image and get image size 
$img = imagecreatefromjpeg("{$pathToImages}"); 
$width = imagesx($img); 
$height = imagesy($img); 

// calculate thumbnail size 
$new_width = $thumbWidth; 
$new_height = floor($height * ($thumbWidth/$width)); 

// create a new temporary image 
$tmp_img = imagecreatetruecolor($new_width, $new_height); 

// copy and resize old image into new image 
imagecopyresampled($tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height); 

// save thumbnail into a file 
imagejpeg($tmp_img, "{$pathToThumbs}"); 

} 

想我过早地发布了这个问题。感谢大家的帮助。

@csw看起来像你的解决方案可能工作,但我得到了我的工作,所以我没有测试它。

0

快速和肮脏的:

function createThumb($pathToImage, $pathToThumb, $thumbWidth) 
{ 
    $fname = $pathToImage; 
    echo "Creating thumbnail for {$fname} <br />"; 

    // load image and get image size 
    $img = imagecreatefromjpeg("{$pathToImage}{$fname}"); 
    $width = imagesx($img); 
    $height = imagesy($img); 

    // calculate thumbnail size 
    $new_width = $thumbWidth; 
    $new_height = floor($height * ($thumbWidth/$width)); 

    // create a new temporary image 
    $tmp_img = imagecreatetruecolor($new_width, $new_height); 

    // copy and resize old image into new image 
imagecopyresampled($tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height); 

    // save thumbnail into a file 
    imagejpeg($tmp_img, "{$pathToThumb}{$fname}"); 
} 
+0

这没有奏效。更多错误现在和现在缩略图不再被创建:( – reubenCanowski 2013-03-21 15:50:17

+0

哪些错误?将它们粘贴在这里 – 2013-03-21 16:04:44

+0

我想通了,再次感谢帮助和检查 – reubenCanowski 2013-03-21 16:08:44

-1

你必须使用像这样的功能:

createThumbs("path_to_image", "path_to_thumb", "thumb_width"); 

更换参数。注意单词“路径”,这是一个目录,如” ../images/02" ,并且您正在使用可能的路径与图片名一起,就像这样:

createThumbs("images/008/01/0000288988r.jpg", " ...... 

它应该是:

createThumbs("images/008/01/" ... 
1

的$映像路径必须指向图像文件
删除
$dir = opendir($pathToImages);
if (false !== ($fname = readdir($dir))) {
// parse path for the extension
$info = pathinfo($pathToImages . $fname);

添加$info = pathinfo($pathtoImages); // for the file name
$fname = $info['filename']

只有$pathToImages取代{$pathToImages}{$fname},因为它的图像文件。

顺便说一句,这段代码并不冗长。