How to check if a file was sent by a form?

6,050 Expert 4TB

I'm developing a small image hosting project (not commercial just a project to test my php abilities)

and i want to check that the user has entered a file

the code:

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<?php

$lengthCheck = $_POST['file'];

if(strlen($lengthCheck) < 1){

setcookie("shortLength", "No File Innput", time()+3600);

header('Location: http://mahcuz.com/upload.php');

}

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

i want to check that the user has input a file and if not redirect back to the previous page. There's a cookie so i can display an error on the previous page.

Even if there is a file entered the page is still redirected..

Any ideas?

Much thanks.

Sep 9 '07 #1

Subscribe Post Reply

2670

Atli

5,058

Expert 4TB

Hi Markus.

Try using the isset() function.

Also, files are not passed as text variables, via the $_POST array. They are sent as a part of the $_FILES array.

So try something like this:

Expand|Select|Wrap|Line Numbers

 
# Check if the file element is set

if(isset($_FILES['myFile'])) {

  # Check if the upload was successful.

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

    # File was uploaded successfully

  }

  else {

    # File was sent but failed to be uploaded!

  }

}

else {

  # File was not sent!

}

Sep 9 '07 #2

Atli

5,058

Expert 4TB

I've changed the title of this thread to better describe it's topic.
Using good, descriptive titles that follow the Posting Guidelines will increase your chances of getting you questions answered!

Also, please use [code] tags when posting code. It is barely readable without them!

Moderator

Sep 9 '07 #3

Markus

6,050

Expert 4TB

I've changed the title of this thread to better describe it's topic.
Using good, descriptive titles that follow the Posting Guidelines will increase your chances of getting you questions answered!

Also, please use [code] tags when posting code. It is barely readable without them!

Moderator

Sorry! I am a noob >.<

Noted though, and thanks alot!

Sep 9 '07 #4

Markus

6,050

Expert 4TB

Hi Markus.

Try using the isset() function.

Also, files are not passed as text variables, via the $_POST array. They are sent as a part of the $_FILES array.

So try something like this:

Expand|Select|Wrap|Line Numbers

# Check if the file element is set

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

  # Check if the upload was successful.

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

    # File was uploaded successfully

  }

  else {

    # File was sent but failed to be uploaded!

  }

}

else {

  # File was not sent!

}

Ahh but ofcourse! Thanks alot! :D

Ahh thanks so much! :D:D

Sep 9 '07 #5

Atli

5,058

Expert 4TB

Glad I could help :)
Please don't hesitate to post again if you have any more questions or problems we can help with!

Sep 9 '07 #6

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