Question

In the $_FILES global variable, when i used

1. $_FILES["file"]["name"] : I am getting the name of the file which i am uploading.
2. $_FILES["file"]["type"] : Here i am getting blank data. But when i used ISSET function on this variable ( isset($_FILES["file"]["type"]) ), it’s returning 1.
3. $_FILES["file"]["size"] : It returning zero.

I really don’t know, what is the real cause of this issue?
(As i am observing this issue is not happening in case of creating a new record, i.e., add a new record in the table and upload the specified file to the server.
But, the said problem is happening only when i try to edit an existing record i.e., replacing the old file with a new file by uploading the new file.)

Answer 1

From the manual…

If no file is selected for upload in your form, PHP will return $_FILES['userfile']['size'] as 0, and $_FILES['userfile']['tmp_name'] as none.

Also, isset returns true when you check $_FILES["file"]["type"] because it is set, that is the variable exists, but its value is empty. Instead of isset, use if (empty($_FILES["file"]["type"]))

You should not trust $_FILES["file"]["type"] either as it can either be spoofed by the user, or just plain wrong.

Do you get the above errors only if no file was uploaded? Or was a file uploaded? It may be that there was an error with the file so those parts of the array were not set.

Post some more code and a more descriptive explanation of the problem and how you can reproduce it and we can help more.