$_FILES help

[noclist]

How do I determine if

$_FILES['thumbNail']['name']

is blank?

 

I am uploading images into a folder on my server called thumbNail and I would like to specify a default image (noimage.gif) if no prior image has been uploaded, but I'm having trouble getting an if statement to register true if the image upload was skipped. Thank you.

[Jessica]

First, isset(). Then you can use strlen() if it's a string to see how many characters long it is.

[noclist]

if (!isset($_FILES['thumbNail']['name']))
{
$thumbNail="thumbNail/noimage.gif";
}

 

Is something like that how I would check if there is a value already?

Then obviously I'm trying to assign noimage.gif if there is no value.

[Jessica]

if (!isset($_FILES['thumbNail']['name']))
{
$thumbNail="thumbNail/noimage.gif";
}

 

Is something like that how I would check if there is a value already?

Then obviously I'm trying to assign noimage.gif if there is no value.

 

Yes, but to make it make sense you need to do this

if (!isset($_FILES['thumbNail']['name']))

{

$thumbNail="thumbNail/noimage.gif";

}else{

$thumbNail=$_FILES['thumbNail']['name'];

}

 

So you keep using the same variable. (I'd switch the order of the if/else and use isset() instead of !isset() personally)

[noclist]

Okay, looks like it is verifying correctly, but I'm still having trouble assigning the default image.

 

It turns out the folder I was uploading to is called movieThumbs, not thumbNail...

 

	if (isset($_FILES['thumbNail']['name']))
{
$thumbNail = $_FILES['thumbNail']['name'];
}
else
{
$thumbNail="movieThumbs/noimage.gif";
}

 

Leaving the thumbnail field blank still results in a broken image linking to just the movieThumbs/ directory.

[Jessica]

don't just use isset(), also use strlen(), as I originally posted. You need to check if isset and that it's more than 0 characters.

[Pikachu2000]

I'd also recommend throwing trim() into the mix.

[PFMaBiSmAd]

Your code needs to test the $_FILES['thumbNail']['error'] element to determine if an actual file was successfully uploaded, because the ['name'] element will be set to a value for several of the possible upload errors.

[Jessica]

Your code needs to test the $_FILES['thumbNail']['error'] element to determine if an actual file was successfully uploaded, because the ['name'] element will be set to a value for several of the possible upload errors.

Great answer  

[noclist]

How do I go about testing for that error? I tried this with no luck:

 

	if ($_FILES['thumbNail']['error'] == 0)
{
$thumbNail = $_FILES['thumbNail']['name'];
}
else
{
$thumbNail="movieThumbs/noimage.gif";

[PFMaBiSmAd]

http://www.php.net/manual/en/features.file-upload.errors.php

[noclist]

Using this method...

 

if($_FILES['userfile']['error']==0) {

  // process

} else {

  // handle the error

}

 

	if($_FILES['thumbNail']['error']==0) 
{
  	$thumbNail = $_FILES['thumbNail']['name'];
} 
else 
{
$thumbNail="movieThumbs/noimage.gif";
}

 

Still having the same issue. I must be doing something fundamentally wrong.

[PFMaBiSmAd]

How about displaying all your post/files data to see what you are getting -

echo "<pre>";
echo "POST:";
print_r($_POST);
echo "FILES:";
print_r($_FILES);
echo "</pre>";

[noclist]

Here is what echoes for thumbNail:

 

When I choose a thumbnail image to upload:

 

    [thumbNail] => Array

        (

            [name] => x.gif

            [type] => image/gif

            [tmp_name] => /var/tmp/phpXylX84

            [error] => 0

            => 6577

        )

 

When I leave the thumbnail field blank:

 

    [thumbNail] => Array

        (

            [name] =>

            [type] =>

            [tmp_name] =>

            [error] => 4

            => 0

        )

 

error 4 being no file uploaded, which is what I should see. I feel like I'm doing everything right except perhaps

 

	else 
{
$thumbNail="movieThumbs/noimage.gif";
}

 

Is that the correct way to assign the default image to that variable given my error 4?

[noclist]

Update: Finally figured it out. Had to remove the 'movieThumbs/" when assigning the default image.

Thanks to everyone who helped, mark it solved.

[Pikachu2000]

You can mark it solved. It's the green button to lower left that says 'Mark Solved' . . .