php上传图片，我怎样才能为这段代码添加质量？

我想将qualit=80添加到我的上载图像文件。。。但没有成功：(

这就是我的代码：

<?php
// Set limit image size                                   
$limitFileSize=300000;
// Set thumbnail-height to xxx in pixels                                    
$imageheight=250; 
  if($peoplef_id=='0'){
    $query  = "SELECT * FROM peoplef WHERE emailzugang='$emailzugang1'  ";
 $result = mysql_query($query);
 while($row = mysql_fetch_array($result, MYSQL_ASSOC)){$peoplef_id=$row['id'];};
  }
if($peoplef_id!='0'){
uploadPic("pic1",$peoplef_id,$limitFileSize);
uploadPic("pic2",$peoplef_id,$limitFileSize);
uploadPic("pic3",$peoplef_id,$limitFileSize);
uploadPic("pic4",$peoplef_id,$limitFileSize);
uploadPic("pic5",$peoplef_id,$limitFileSize);
uploadPic("pic6",$peoplef_id,$limitFileSize);
uploadPic("pic7",$peoplef_id,$limitFileSize);
uploadPic("pic8",$peoplef_id,$limitFileSize);
}
function uploadPic($PicName,$itemsID,$limitFileSize)
{
 //if($_FILES[$PicName]['size'] > 0 && $_FILES[$PicName]['size'] < $limitFileSize )
 //{
 if($_FILES[$PicName]['size'] > 0  )
 {

 $fileName = $_FILES[$PicName]['name'];
 $tmpName  = $_FILES[$PicName]['tmp_name'];
 $fileSize = $_FILES[$PicName]['size'];
 $fileType = $_FILES[$PicName]['type'];
$imgsize = GetImageSize($tmpName);
    $widthWanted=$imgsize[0];
    $heightWanted=$imgsize[1];
    /*== check size  0=width, 1=height ==|| ($imgsize[1] > 200)    */
    if (($imgsize[0] > 650) ) 
    {
    $widthWanted=2000;
    $heightWanted=ceil((1600/$imgsize[0])*$imgsize[1]);
    }
 echo $widthWanted;
echo "-----";
echo $heightWanted;
 $array=array();
echo "<pre>";
$current_file=$tmpName;
$thumb_name="TempUploadImg/".$PicName.$itemsID.".jpg";
exec("convert ".$current_file." -resize $widthWantedx$heightWanted ".$thumb_name, $array); 
echo "<br>".print_r($array)."<br>"; 
echo "</pre>";
$fp      = fopen($thumb_name, 'r');
 $content = fread($fp, filesize($thumb_name));
 $content = addslashes($content);
 fclose($fp);
 if(!get_magic_quotes_gpc())
 {
 $fileName = addslashes($fileName);
 }
 $picnum=$PicName;
 $query = "INSERT INTO uploadf (peoplef_id, picnum, name, size, type, content ) ".
 "VALUES ('$itemsID', '$picnum', '$fileName', '$fileSize', '$fileType', '$content')";
 //delete("test.jpg");
 mysql_query($query) or die('Error, query failed'); 

 echo "<br>Filee ". basename( $fileName). " uploaded<br><br>";
 }
 //else
 //{    
 ///   if($_FILES[$PicName]['size'] > 0){
 // $fileName = $_FILES[$PicName]['name'];
 // echo "<br><font color=red> File limit Size is $limitFileSize  ; canot uploaded $fileName  </font><br>";
 //   }
 //}
}
?>

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实际上这是一个Imagemagick问题，因为调整大小是使用Imagemagick完成的

根据，要在编写JPEG时设置质量，需要设置

-quality

，因此需要如下更改代码：

---

只需粘贴代码片段，这对于查看问题的人来说更为重要，尤其是如果您的链接在以后变得无效汤米谢谢…我尝试添加代码片段，但没有效果。也许您可以从链接添加我的代码并添加它…？。它们不再被维护，并且弃用过程已经开始，请参阅。了解改为about，并使用or；将帮助您决定使用哪个。如果您选择PDO。

exec("convert ".$current_file." -resize $widthWantedx$heightWanted -quality 80 ".$thumb_name, $array);