upload file -quick question

EyeSight

hey guys, i have a script which allows a user to upload an image. however if the image is over 2mb or not a specific file type, then an error is printed and they must re-upload a smaller image
however if the user goes back to the image upload page, the old image path is in the box and i can't delete it (by using backspace or delete button or anything!)

is there a way to fix this? without having to redirect to a fresh upload page?

here is a small bit of the code:

<form enctype="multipart/form-data" action="upload.php" method="post">
      <input type="file" name="image" id="image" />
</form>

daymobrew

Maybe try setting the value. I have not tested this.

<form enctype="multipart/form-data" action="upload.php" method="post">
      <input type="file" name="image" id="image"  [B]value=""[/B] />
</form>

Liam Byrne

You could try a header redirect to the original page on error, e.g.

<?php if ($filesize_error) {
    header("Location:uploadPage.php?reason=filesize");
    die();
}
?>

Then, on the upload page

<?php if ($_GET["reason"]=="filesize") { ?>
<pThe image file that you uploaded was not a valid filesize</p> 
<?php } ?>
<form enctype="multipart/form-data" action="upload.php" method="post">
      <input type="file" name="image" id="image" />
</form>

EyeSight

Liam Byrne wrote: »

You could try a header redirect to the original page on error, e.g.

<?php if ($filesize_error) {
    header("Location:uploadPage.php?reason=filesize");
    die();
}
?>

Then, on the upload page

<?php if ($_GET["reason"]=="filesize") { ?>
<pThe image file that you uploaded was not a valid filesize</p> 
<?php } ?>
<form enctype="multipart/form-data" action="upload.php" method="post">
      <input type="file" name="image" id="image" />
</form>

thanks for the reply. i think i understand what you're saying, except for this

if ($_GET["reason"]=="filesize")

am i right by assuming on redirect, it sends the reason via GET and then on the page where the images can be uploaded, it reads the GET array?

also the

value=""

doesn't work thanks anyway

zoudards

I don't think you can write in the input field of type "file", you can only chose the file by clicking the relevant button. Most of the browsers will remember what the form fields' values were set to if you click back on your browser, i'm afraid you have to either add a client side script that reset the field on load or refresh the page. depending how big the page is, a refresh is a lot simpler.

Liam Byrne

EyeSight wrote: »

am i right by assuming on redirect, it sends the reason via GET and then on the page where the images can be uploaded, it reads the GET array?

Yup!

Basically you're not showing the upload target page if the file is too big (you're redirecting back to the original page), so you're sending a variable back to say "show the paragraph on that page that relates to the 'resize' error".

If there's no $_GET["reason"] variable, then that paragraph doesn't appear, which caters for when they visit the page at first.

fcrossen

I've also used something like:

[HTML]<input type="file" name="image<?php echo str_replace( array(' ','.') , '' , microtime() ); ?>" id="image" />[/HTML]

to prevent browser autocomplete on fields like usernames.

This will append a unique string to your name field:

[HTML]<input type="file" name="image0457457001281600026" id="image" />[/HTML]

Instead of looking for a POST var called "image" you look for one that starts with "image".