checking if variable exists; file upload oddness?

[bliss322]

hi.

i have a form with a file field that i use to upload photos.

before i save the file to the db, i'm trying to see if a file was submitted, and then i save it to the db; and that's where the oddity part is.

for some reason, an empty file field is returning the value "none"?

<form name="add" method="post" action"" enctype="multipart/form-data">
<INPUT NAME="adImage" TYPE="file">
</form>

any suggestions here?

[jpmoriarty]

we could do with seeing the code for your action, but without it...

I always have a check in there (on the action page):

if(@!$adImage)
  echo "You did not select a file"

alternatively though, you could edit that to accommodate what you're getting:

if(@!$adImage || @$adImage = "none")
  echo "You did not select a file"

Hope that helps

[bliss322]

thanks. i thought i had put code in there.

what i ended up doing was similar

if (!adImage || adImage = "none"){
//don't process
}

question, though... what's the purpose of putting the "@"s in the script? i've seen this before and am still unclear on the reason for it.

[stolzyboy]

it supresses errors to the screen

[jpmoriarty]

...just what stoltzyboy said - it means that if an error is produced whilst executing that bit of code, then it doesnt display it. It's handy with the ! condition, because if it doesn't exist then you get an undefined variable warning outputted to the screen. Since that's what we're testing for, it's okay to ignore it.