can't access pset7 outside appliance: undefined index: HTTP_HOST

Question

I'm having trouble accessing my pset7 website outside of the appliance. I completed pset6 and can access content from it just fine. I'm using windows 7 and have vmware2014. Here is the error I keep getting

( ! ) Notice: Undefined index: HTTP_HOST in /home/jharvard/vhosts
/pset7/includes/functions.php on line 198

Call Stack

#   Time    Memory  Function    Location

1   0.0004  127672  {main}( )   ../login.php:0

2   0.0006  128148  require( '/home/jharvard/vhosts/pset7/includes
/config.php' )  ../login.php:4

3   0.0018  130616  redirect( ) ../config.php:28

Note: This is my first time posting to stackexchange so I'd appreciate any constructive criticism if my question falls short of any of the site's guidelines.

Answer 1

A simple google search returned this result first:

PHP: "Notice: Undefined variable" and "Notice: Undefined index"

If you follow the link you will see a much more detailed explanation, but long answer short, you get this notice because PHP sees that you use a variable that might not have been initialized and may result in some security issue. To solve that, just use isset() before using the actual variable.

Example:

$value = isset($_POST['value']) ? $_POST['value'] : '';

The <expression> ? <value> : <value> is called a ternary operator and its use is the same as in C. If you have more questions about anything of this feel free to ask.

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