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Limiting file Upload Size

 
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vigar_neil
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Joined: 10 May 2006
Posts: 5
Location: manchester
PostPosted: Sat Apr 21, 2007 4:59 pm    Post subject: Limiting file Upload Size Reply with quote
Hi

I have the 2 sections of code that work together wonderfully. However I can not work out how to restrict the size of the files that are being uploaded.

Can anybody help with any suggestions of code?

Many Thanks
Neil

Code:

<?php
 include 'config.inc.php';
include 'design.inc.php';
 // initialization
 $photo_upload_fields = '';
 $counter = 1;

 // If we want more fields, then use, preupload.php?number_of_fields=20
 $number_of_fields = (isset($_GET['number_of_fields'])) ?
   (int)($_GET['number_of_fields']) : 2;

 // Firstly Lets build the Category List
                   
$clubname45 = $clubinfo['ClubName'];


// gallery_photos WHERE photo_category='".addslashes($cid)."'" );
 $result = mysql_query("SELECT clubid,clubname FROM clubs WHERE clubname='".addslashes($clubname45)."' ");
//$sql = 'SELECT * FROM `gallery_photos` WHERE `photo_category` = 1 LIMIT 0, 30 ';
 while($row = mysql_fetch_array($result)) {
$photo_category_list .= <<<__HTML_END
<option value="$row[0]">$row[1]</option>\n
__HTML_END;
 }
 mysql_free_result( $result );   

 // Lets build the Image Uploading fields
 while($counter <= $number_of_fields) {
   $photo_upload_fields .= <<<__HTML_END
<tr><td>
 Photo {$counter}:
 <input name="photo_filename[]"
type="file" />
</td></tr>
<tr><td>
 Photo Title:
 <textarea name="photo_tittle[]" cols="30"
   rows="1"></textarea>
</td></tr>
<tr><td>
 Description:
 <textarea name="photo_description[]" cols="30"
   rows="3"></textarea>
</td></tr>
<tr><td>
Questions:
 <textarea name="questions[]" cols="30"
   rows="3"></textarea>
</td></tr>
<tr><td>
 Posted by:
 <textarea name="posted_by[]" cols="30"
   rows="1"></textarea>
<br/><br/></td></tr>
__HTML_END;
$counter++;
 }

 // Final Output
echo <<<__HTML_END
<html>
<head>
<title>Lets upload Photos</title>
</head>
<body>
<form enctype="multipart/form-data"
 action="upload.php" method="post"
 name="upload_form">
 <table width="90%" border="0"
   align="center" style="width: 90%;">
   <tr><td>
     Select Category
     <select name="category">
     $photo_category_list
     </select>
   </td></tr>
   <!-Insert the image fields here -->
   $photo_upload_fields
   <tr><td>
     <input type="submit" name="submit"
       value="Add Photos" />
   </td></tr>
 </table>
</form>
</body>
</html>
__HTML_END;

Code:

              <table width="50%"  border="5" cellspacing="0" cellpadding="10">
                <tr>
                  <td colspan="2"><?php
   include("config.inc.php");

   // initialization
   $result_final = "";
   $counter = 0;

   // List of our known photo types
   $known_photo_types = array(
                  'image/pjpeg' => 'jpg',
                  'image/jpeg' => 'jpg',
                  'image/gif' => 'gif',
                  'image/bmp' => 'bmp',
                  'image/x-png' => 'png'
               );
   
   // GD Function List
   $gd_function_suffix = array(
                  'image/pjpeg' => 'JPEG',
                  'image/jpeg' => 'JPEG',
                  'image/gif' => 'GIF',
                  'image/bmp' => 'WBMP',
                  'image/x-png' => 'PNG'
               );

   // Fetch the photo array sent by preupload.php
   $photos_uploaded = $_FILES['photo_filename'];

   // Fetch the photo caption array
   $photo_caption = $_POST['photo_tittle'];
   $photo_description = $_POST['photo_description'];
   $questions = $_POST['questions'];
   $posted_by = $_POST['posted_by'];

$limit_size=50000;

   while( $counter <= count($photos_uploaded) )
   {
   
if($photos_uploaded['size'][$counter] > 0)
      {
         if(!array_key_exists($photos_uploaded['type'][$counter], $known_photo_types))
         {
            $result_final .= "File ".($counter+1)." is not a photo please go back to the photos upload page and try again.<br />";
         }
         else
         {
            mysql_query( "INSERT INTO gallery_photos(`photo_filename`, `photo_tittle`, `photo_description`, `posted_by`, `questions`, `photo_category`) VALUES('0', '".addslashes($photo_caption[$counter])."', '".addslashes($photo_description[$counter])."', '".addslashes($posted_by[$counter])."', '".addslashes($questions[$counter])."', '".addslashes($_POST['category'])."')" );
            $new_id = mysql_insert_id();
            $filetype = $photos_uploaded['type'][$counter];
            $extention = $known_photo_types[$filetype];
            $filename = $new_id.".".$extention;

            mysql_query( "UPDATE gallery_photos SET photo_filename='".addslashes($filename)."' WHERE photo_id='".addslashes($new_id)."'" );

            // Store the orignal file
            copy($photos_uploaded['tmp_name'][$counter], $images_dir."/".$filename);

            // Let's get the Thumbnail size
            $size = GetImageSize( $images_dir."/".$filename );
            if($size[0] > $size[1])
            {
               $thumbnail_width = 100;
               $thumbnail_height = (int)(100 * $size[1] / $size[0]);
            }
            else
            {
               $thumbnail_width = (int)(100 * $size[0] / $size[1]);
               $thumbnail_height = 100;
            }
         
            // Build Thumbnail with GD 1.x.x, you can use the other described methods too
            $function_suffix = $gd_function_suffix[$filetype];
            $function_to_read = "ImageCreateFrom".$function_suffix;
            $function_to_write = "Image".$function_suffix;

            // Read the source file
            $source_handle = $function_to_read ( $images_dir."/".$filename );
            
            if($source_handle)
            {
               // Let's create an blank image for the thumbnail
                    $destination_handle = ImageCreate ( $thumbnail_width, $thumbnail_height );
            
               // Now we resize it
                  ImageCopyResized( $destination_handle, $source_handle, 0, 0, 0, 0, $thumbnail_width, $thumbnail_height, $size[0], $size[1] );
            }

            // Let's save the thumbnail
            $function_to_write( $destination_handle, $images_dir."/tb_".$filename );
            ImageDestroy($destination_handle );
            //

            $result_final .= "<img src='".$images_dir. "/tb_".$filename."' /> File ".($counter+1)." Added<br />";
if ($uploaded_size > 350000)
      {
      echo "Your file is too large.<br>";
      $ok=0;
      }    
         }
      }
   $counter++;
   }

   // Print Result
echo <<<__HTML_END

<html>
<head>
   <title>Photos uploaded</title>
</head>
<body>
   $result_final
</body>
</html>

__HTML_END;
?>
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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
PostPosted: Sat Apr 21, 2007 5:13 pm    Post subject: Reply with quote
From what I can remember, a hidden field can restrict the upload size.

Code:
<input type="hidden" name="MAX_FILE_SIZE" value="10000000">


But this can be easily overridden. I think the value is in bytes.
_________________
Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk
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cmxflash
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Joined: 11 Dec 2004
Posts: 872
PostPosted: Sat Apr 21, 2007 5:37 pm    Post subject: Reply with quote
Just edit your php.ini-file, usually the upload limit is set to 2 MB.
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Flux
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Joined: 13 Oct 2006
Posts: 48
PostPosted: Sun Apr 22, 2007 5:44 pm    Post subject: Reply with quote
You could also program the post-upload script to check the size.
Like, if file x > 20MB, cancel upload, etc. (Using, as I'm sure you already know, $_FILES['x']['size'])
_________________
My signature is so lame.

I think phpBB forums hates my laptop '.';
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