thankyou.php redirect header

What is the purpose of redirecting to the thank you page only if "index.php" is not blank?

In other words, in "contactus.php", within the following code:

//Send Mail All Entries
if ("index.php"!="") {
header("Location: thankyou.php");
}

what is the purpose of

if("index.php"!="")

?

This is the only part of the code that's given me trouble, so I'm trying to better understand the significance of basing the redirect on a page that doesn't exist ("index.php").

Thanks!

it is only a string comparison used to determine if the header function should be used at all.
This is code generated by the Universal Email extension.


In the extension you could leave the redirect blank. if you do, that code would be written as:
//Send Mail All Entries
if ("" !="") {
header("Location: ");
}

If the if statement where left out in this case, it would generate an error due to the missing parameter in the header function.

That makes sense. The only part I don't understand is why the "if" statement is checking against a file ("index.php") that doesn't exist. Does this file exist in the Universal Email extension?

it's not checking the file. it's checking the string.

the if statement could be
if("dog" != "")

or:
if("dog" != "cat")


it's string comparison, that just happens to use the string "index.php".

it's not checking for the existence of the file, just that the first string ("index.php") is not the same as the second string ("")

That clears it up. Thanks.

One last thing: What purpose does the string comparison serve? Why not just call the header alone?

I'm not doubting it's use. I'm just trying to understand it better.

If the if statement where left out in this case, it would generate an error due to the missing parameter in the header function.

Thanks for all your help!

you're welcome.