[Resolved] Can Someone explain fopen() to me, please?

[masood131]

I have read the phpManual about fopen() twice, but it does not help me with my question.

I am reading this php, MySql Web Development book, and here is what it says:

//to copy the long-style variable to the short-style name.(this first line I understand)
$DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
$fp = fopen("$DOCUMENT_ROOT/../orders/orders.txt", 'w'); //It is this line that I have a problem with.

They don't explain nothing about what a "DOCUMENT_ROOT" is. Is this a real directory on my computer or a made up one by the book. I did a search and I didn't find anything on my computer.

How do I create relative path? This is what the above line suppose to create.

please give me an example.

I understand that the first line assigns a server object ,the DOCUMENT_ROOT (whatever that is?) to a variable called $DOCUMENT_ROOT. Am I correct?

thanks for looking

masood

[thorpe]

its a server variable, not a server object. and to see what it returns, try;

echo $_SERVER['DOCUMENT_ROOT'];

[masood131]

Thank you. I got it.
masood