$_FILES and if {} else {} statement

[WellBaffled]

Hi all
I have been trying to run a form with a FILE field through an upload script I have written

If the user decided not to include a file the form must be prcessed through on part of the script, and if they did through another. I have tried too run this through several if else statements, but the form is processed through one or the other depedant on state.

Below are some of the options I tried.

if (!isset($_FILES['fieldname'])){

Do this
}
else
{ 
Do this
}


if (!isset($_POST['fieldname'])){

Do this
}
else
{ 
Do this
}


if ($_FILES['fieldname'] = 0){

Do this
}
else
{ 
Do this
}

if ($_POST['fieldname'] = 0){

Do this
}
else
{ 
Do this
}


if ($_FILES['fieldname'] = 0){

Do this
}
else if ($_FILES['fieldname'] > 0){
 
Do this
}



if (!isset($_FILES['fieldname'] )){

Do this
}
else if (isset($_FILES['fieldname'] )){
 
Do this
} 

I can make the script go to one or the other options easily, but it fails to acknowledge both depedant upon an empty field. Am I barking up the worng tree here with regards $_FILES ?

All help appreciated, and thatnks are in advance.

[stereofrog]

Don't try to guess it.
Just find out what you have

var_dump($_FILES);
var_dump($_POST);

[1337-Dev]

if(isset($_FILE['fieldname'])){

if(isset($_POST['fieldname'])) {

// do something here

else {

// if one or bothwere blank do this..

} 

[WellBaffled]

if(isset($_FILE['fieldname'])){ 

if(isset($_POST['fieldname'])) { 

// do something here 

else { 

// if one or bothwere blank do this.. 

} 

Well at a first glance this code has an error in $_FILE should be $_FILES and also it looks unbalanced with {}. I count four not six. Thanks for your suggestion, but I have tried this approach.

if(isset($_FILES['fieldname'])){ 

if(isset($_POST['fieldname'])) { 

// do something here 
    }
}
else { 

// if one or bothwere blank do this.. 

} 

Here's a re-cycled version.

[stereofrog]

A complete example

<form action="" method="post" enctype="multipart/form-data">
<input type="text" name="text_field" value="text_field_value"><br>
<input type="file" name="file_field"><br>
<input type="submit">
</form>

<h2>$_POST  contains</h2><pre><?php var_dump($_POST); ?></pre>
<h2>$_FILES contains</h2><pre><?php var_dump($_FILES); ?></pre>

Instructions:
-- cut'n'paste, save as .php, open in browser
-- click submit firstly without taking a file, then with some file selected, compare results

As you will see, $_FILES is always populated, no matter if you've actually selected anything. Ergo, isset makes no sense, consider other methods.

Documentation: http://us2.php.net/manual/en/features.file-upload.php

[someonewhois]

Was is_uploaded_file not an option?
if (is_uploaded_file($_FILES['file_field']))