$_FILES

[kapz22]

How do i check if a file has been selected to uplload?

 

I tried doing:

 

if ($_FILES["userfile"] != null) {

echo "a file has been selected to upload"; exit;

} else {

echo "a file has not been selected"; exit;

}

 

this does not work and i dont know why. please can some one help.

thanks

[PFMaBiSmAd]

$_FILES["userfile"] will be an array. The php.net upload documentation shows what elements it contains - http://us3.php.net/manual/en/features.file-upload.php

 

About the only time it would be NULL would be if uploads are not enabled on your server or the HTTP request for your page was not the result of a valid upload form with a form field by the name "userfile".

 

You can also see what is in the array using the following code -

 

echo "<pre>",print_r($_FILES,true),"</pre>";

[kapz22]

i came up with this, but i was wondering if there was a better way to do it.

 

if($_FILES["userfile"]["name"] != "") {

etc etc

[LeadingWebDev]

check

$_FILES["field_name"]["tmp_name"] != "none"

 

this should work, as if file not uploaded, tmp name by default will come "none", and not null =)

also u can check filesize or name as u did before. name becomes null, size becomes 0

[kapz22]

Thanks.

 

Im just a php novice so i dont know if the way i am doing things is the right way of doing it.

[PFMaBiSmAd]

The ['error'] element will be a zero value if a file was selected and uploaded successfully.

 

Nothing else really makes sense. The ["name"] element can be set, but there can still be upload errors and the ["tmp_name"] element will never be the string "none".

[LeadingWebDev]

i cant call myself pro as well, but exactly true way to check if file uploaded is to check tmp file, before preforming any actions with file.

[thewooleymammoth]

http://us.php.net/manual/en/function.isset.php

[khr2003]

check out this function:

http://php.net/manual/en/function.is-uploaded-file.php