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Possible Duplicate:
php resizing image on upload rotates the image when i don't want it to
我已经创建了我的第一个上传代码并正在测试它，图像调整大小并上传正常。我遇到的唯一问题是它会旋转。
代码如下:
$errors = array();
$message = "";
if(isset($_POST["test"])){
$name = rand(1,999999) . $_FILES["uploadfile"]["name"];
$temp_name = $_FILES["uploadfile"]["tmp_name"];
$size = $_FILES["uploadfile"]["size"];
$extension = strtolower(end(explode('.', $_FILES['uploadfile']['name'])));
$path = "testupload/" . $name;
$info = getimagesize($temp_name);
$originalwidth = $info[0];
$originalheight = $info[1];
$mime = $info["mime"];
$acceptedHeight = 750;
$acceptedWidth = 0;
$acceptedMimes = array('image/jpeg','image/png','image/gif');
$acceptedfileSize = 4102314;
$acceptedExtensions = array('jpg','jpeg','gif','png');
echo $size;
// check mimetype
if(!in_array($mime, $acceptedMimes)){$errors[] = "mime type not allowed - The file you have just uploaded was a: " . $extension . " file!";}
if(!$errors){if($size > $acceptedfileSize){$errors[] = "filesize is to big - Your file size of this file is: " . $size;}}
if(!$errors){if(!in_array($extension, $acceptedExtensions)){$errors[] = "File extension not allowed - The file you have just uploaded was a: " . $extension . " file!";}}
if(!$errors){
// create the image from the temp file.
if ($extension === 'png'){
$orig = imagecreatefrompng($temp_name);
}elseif ($extension === 'jpeg'){
$orig = imagecreatefromjpeg($temp_name);
}elseif ($extension === 'jpg'){
$orig = imagecreatefromjpeg($temp_name);
}elseif ($extension === 'gif'){
$orig = imagecreatefromgif($temp_name);
}
// work out the new dimensions.
if ($acceptedHeight === 0){
$newWidth = $acceptedWidth;
$newHeight = ($originalheight / $originalwidth) * $acceptedWidth;
}else if ($acceptedWidth === 0){
$newWidth = ($originalwidth / $originalheight) * $acceptedHeight;
$newHeight = $acceptedHeight;
}else{
$newWidth = $acceptedWidth;
$newHeight = $acceptedHeight;
}
$originalwidth = imagesx($orig);
$originalheight = imagesy($orig);
// make ssure they are valid.
if ($newWidth < 1){ $newWidth = 1; }else{ $newWidth = round($newWidth ); }
if ($newHeight < 1){ $newHeight = 1; }else{ $newHeight = round($newHeight); }
// don't bother copying the image if its alreay the right size.
if ($originalwidth!== $newWidth || $originalheight !== $newHeight){
// create a new image and copy the origional on to it at the new size.
$new = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($new, $orig, 0,0,0,0, $newWidth, $newHeight, $originalwidth, $originalheight);
}else{
// phps copy on write means this won't cause any harm.
$new = $orig;
}
// save the image.
if ($extension === 'jpeg' || $extension === 'jpg'){
imagejpeg($new, $path, 100);
}else if ($save_ext === 'gif'){
imagegif($new, $path);
}else{
imagepng($new, $path, round(9 - (100 / (100 / 9))));
}
$message = $path;
有人可以告诉我发生了什么事吗？