php $ _files不断被上传

我有一个脚本，执行一些简单的编辑工作正常，问题是即使一次图像上传成功，我刷新页面相同的图像正在创建，即使它不是从在表单提交文件输入：

<form method="post" enctype="multipart/form-data" id="<?php echo $_SERVER['PHP_SELF']; ?>"> 
        <fieldset id="product-images"> 
        <input type="file" id="image" name="image" /> 
        <input type="submit" name="picture" value="upload Picture"/> 
</form>

这里的PHP

<?php if(isset($_POST['picture']) && !empty($_FILES)){(uploadImage($_FILES['image'])} ;?> 

function uploadImage($image) 
{ 
    $id = intval($_GET['id']); 
    $size = 75; // the thumbnail height 

    $filedir = '../img/products/'; // the directory for the original image 
    $thumbdir = '../img/products/thumbs/'; // the directory for the thumbnail image 
    $prefix = 'small_'; // the prefix to be added to the original name 

    $maxfile = '2000000'; 
    $mode = '0666'; 

    $userfile_name = $image['name']; 
    $userfile_tmp = $image['tmp_name']; 
    $userfile_size = $image['size']; 
    $userfile_type = $image['type']; 

    if (isset($image['name'])) 
    { 
     $prod_img = $filedir.$userfile_name; 
     $url = strstr($userfile_name, '.', true); 
     $type = strstr($userfile_name, '.'); 


     $prod_img_thumb = $thumbdir.$prefix.$userfile_name; 
     move_uploaded_file($userfile_tmp, $prod_img); 
     chmod ($prod_img, octdec($mode)); 

     $sizes = getimagesize($prod_img); 
     $width = $size[0]; 
     $height = $size[1]; 
     if($width > $height) $biggestSide = $width; 
     else $biggestSide = $height; 

     //The crop size will be half that of the largest side 
     $cropPercent = 1; 
     $cropWidth = $biggestSide*$cropPercent; 
     $cropHeight = $biggestSide*$cropPercent; 

     //getting the top left coordinate 
     $c1 = array("x"=>($width-$cropWidth)/2, "y"=>($height-$cropHeight)/2); 

     $aspect_ratio = $sizes[1]/$sizes[0]; 

     if ($sizes[1] <= $size) 
     { 
      $new_width = $sizes[0]; 
      $new_height = $sizes[1]; 
     }else{ 
      $new_height = $size; 
      $new_width = abs($new_height/$aspect_ratio); 
     } 

     $destimg=ImageCreateTrueColor($new_width,$new_height) 
      or die('Problem In Creating image'); 
     $srcimg=ImageCreateFromJPEG($prod_img) 
      or die('Problem In opening Source Image'); 
     if(function_exists('imagecopyresampled')) 
     { 
      imagecopyresampled($destimg,$srcimg,0,0,$c1['x'],$c1['y'],$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg)) 
      or die('Problem In resizing'); 
     }else{ 
      Imagecopyresized($destimg,$srcimg,0,0,0,0,$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg)) 
      or die('Problem In resizing'); 
     } 
     ImageJPEG($destimg,$prod_img_thumb,90) 
      or die('Problem In saving'); 
     imagedestroy($destimg); 
     imagedestroy($srcimg); 

     insertURL($id, $url, $type); 

    } 


}

来源

2011-02-15 Jamie

如果刷新页面，则表单将被重新提交。大多数浏览器都会问这个问题。一个常见的解决方案是在提交完成后重定向到不同的页面，甚至是同一页面，这将阻止重新提交。 – Gazler 2011-02-15 14:27:41

您刷新哪个页面？ “你上传完成”一个？这是理由 - 这是上传的结果页面。刷新一个会给你通常的“这个页面是POST的结果？重做POST？”键入警告，它会重新提交整个表单，包括文件。

要防止刷新重新上传，必须在表单处理代码完成后将其重定向到其他地方。

<?php 

if ($_SERVER['REQUEST_METHOD'] == 'POST') { 

    // handle the upload 

    if (/*form processed OK*/) { 
     header("Location: successpage.php"); 
     exit(); 
    } else { 
     // report any error conditions 
    } 
} 

// show the form 

?>

来源

2011-02-15 14:30:06