php图像调整大小，但调整后不保存

Question

我正在尝试上传图像，然后调整图像大小并保存。上载正常，并且调整大小也可以，但是调整大小的图像无法保存。如果我使用标题（“内容类型：图片/ jpeg”）；然后它也会显示调整大小的图像。但调整大小后，图像将无法保存。 这是我的代码：

    $filename = $_FILES['myfile']['name'][$count] ;

    $filename = uploadfilename($filename);  
    $filename1=$iiid."blog".$filename;
    $target_path = "../photo/";

    $target_path = $target_path . repc($filename1);

    move_uploaded_file($_FILES['myfile']['tmp_name'][$count], $target_path);    
    $dbfield = $count+1;           
    $sql="update product set img_".$dbfield." ='".rep($filename1)."' where id='".$iiid."'";
    $result=mysql_query($sql);
    $count++;
    // header ("Content-type: image/jpeg");
    // print_r(get_resource_type($uploadedImage));exit();
    // $resizedImage = PIPHP_ImageResize($target_path,400,400);
    $w = 100;
    $h = 100;
    list($width, $height) = @getimagesize($target_path);  
    $source = @ImageCreateFromJPEG($target_path);
    $resized_img = @ImageCreateTrueColor($w, $h);       
    @ImageCopyResampled($resized_img, $source, 0, 0, 0, 0, $w, $h, $width, $height);
    @ImageJPEG($resized_img);