On Thursday 23 August 2007 03:41, Beauford wrote:
> I downloaded this 'upload and resize image' script, and since I have no
> idea what I am looking at as this is something I have never done, could
> someone have a look and see what the problem might be. I've been searching
> around but haven't come across anything that makes any sense yet.
>
> When a picture needs to be resized I am getting the following error. If it
> is the same size or under I don't get this error.
>
> Warning: unlink() [function.unlink]: No such file or directory in
> /usr/local/apache/htdocs/website/upload.php on line 92
This full code of yours should be no more than 7 lines. However, delete line
92, it's not needed to make the script actually upload stuff.
You should have a file like php12312 file name or similar at the default
upload path defined in php.ini. This file is the $_file['tmp_name'] within
the $files array, so while at it; don't make use of a $formname for
everything.
If you make use of the $_files['array'] stuff the code would be so much more
manageable within the linux os.
If the temp file does not occur; you got the netpbm and djpeg installed?
Not sure about making this sort of things work under a windows system, but on
linux its a sundaysprawl
>
> The full code is below.
>
> Thanks
>
> ------------------------------------------------------------------
>
> <html>
>
> <head>
> <title>web.blazonry : PHP : Upload and Resize an Image</title>
>
> <?php
>
> if ($_SERVER['REQUEST_METHOD'] == "POST")
> {
>
> /* SUBMITTED INFORMATION - use what you need
> * temporary filename (pointer): $imgfile
> * original filename : $imgfile_name
> * size of uploaded file : $imgfile_size
> * mime-type of uploaded file : $imgfile_type
> */
>
> /*== upload directory where the file will be stored
> relative to where script is run ==*/
>
> $uploaddir = "images";
>
>
> /*== get file extension (fn at bottom of script) ==*/
> /*== checks to see if image file, if not do not allow upload ==*/
> $pext = getFileExtension($imgfile_name);
> $pext = strtolower($pext);
> if (($pext != "jpg") && ($pext != "jpeg"))
> {
> print "<h1>ERROR</h1>Image Extension Unknown.<br>";
> print "<p>Please upload only a JPEG image with the extension .jpg
> or .jpeg ONLY<br><br>";
> print "The file you uploaded had the following extension:
> $pext</p>\n";
>
> /*== delete uploaded file ==*/
> unlink($imgfile);
> exit();
> }
>
>
> //-- RE-SIZING UPLOADED IMAGE
>
> /*== only resize if the image is larger than 250 x 200 ==*/
> $imgsize = GetImageSize($imgfile);
>
> /*== check size 0=width, 1=height ==*/
> if (($imgsize[0] > 250) || ($imgsize[1] > 200))
> {
> /*== temp image file -- use "tempnam()" to generate the temp
> file name. This is done so if multiple people access the
> script at once they won't ruin each other's temp file ==*/
> $tmpimg = tempnam("/tmp", "MKUP");
>
> /*== RESIZE PROCESS
> 1. decompress jpeg image to pnm file (a raw image type)
> 2. scale pnm image
> 3. compress pnm file to jpeg image
> ==*/
>
> /*== Step 1: djpeg decompresses jpeg to pnm ==*/
> system("djpeg $imgfile >$tmpimg");
>
>
> /*== Steps 2&3: scale image using pnmscale and then
> pipe into cjpeg to output jpeg file ==*/
> system("pnmscale -xy 250 200 $tmpimg | cjpeg -smoo 10 -qual 50
>
> >$imgfile");
>
> /*== remove temp image ==*/
> unlink($tmpimg);
>
> }
>
> /*== setup final file location and name ==*/
> /*== change spaces to underscores in filename ==*/
> $final_filename = str_replace(" ", "_", $imgfile_name);
> $newfile = $uploaddir . "/$final_filename";
>
> /*== do extra security check to prevent malicious abuse==*/
> if (is_uploaded_file($imgfile))
> {
>
> /*== move file to proper directory ==*/
> if (!copy($imgfile,"$newfile"))
> {
> /*== if an error occurs the file could not
> be written, read or possibly does not exist ==*/
> print "Error Uploading File.";
> exit();
> }
> }
>
> /*== delete the temporary uploaded file ==*/
> unlink($imgfile);
>
>
> print("<img src=\"images\\$final_filename\">");
>
> /*== DO WHATEVER ELSE YOU WANT
> SUCH AS INSERT DATA INTO A DATABASE ==*/
>
> }
> ?>
>
>
> </head>
> <body bgcolor="#FFFFFF">
>
> <h2>Upload and Resize an Image</h2>
>
> <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST"
> enctype="multipart/form-data">
> <input type="hidden" name="MAX_FILE_SIZE" value="50000">
>
> <p>Upload Image: <input type="file" name="imgfile"><br>
> <font size="1">Click browse to upload a local file</font><br>
> <br>
> <input type="submit" value="Upload Image">
> </form>
>
> </body>
> </html>
>
> <?php
> /*== FUNCTIONS ==*/
>
> function getFileExtension($str) {
>
> $i = strrpos($str,".");
> if (!$i) { return ""; }
>
> $l = strlen($str) - $i;
> $ext = substr($str,$i+1,$l);
>
> return $ext;
>
> }
> ?>
--
---
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