///////////////////////Help!/////////////////////////////////////

1- $editFormAction = $HTTP_SERVER_VARS['PHP_SELF'];
2- if (isset($HTTP_SERVER_VARS['QUERY_STRING'])) {
3- $editFormAction .= "?" . $HTTP_SERVER_VARS['QUERY_STRING'];
}

1- If i am right the line one shows that this form will take action on this same page.

2- what the line 2 explain with respect of this variable['QUERY_STRING'], either it is not declared anywhere on this page just on this place.

3- What the line 3 shows, i am not gettin understand.

what is the difference between $_request[] and $HTTP_SERVER_VARS.

I have spent alot of my time to understand this from manuel but in vain.

plz help me to get this understand.
I will b very thankful to u for his.
Thanks.

Line 1: $editFormAction is being set to the script's file name
Line 2: if a query string exists go to Line 3
Line 3: "?" and the query string is appended to the $editFormAction variable

If you're not sure what a query string is, look in the address bar on your web browser, you should see something similar to "topic.asp?TOPIC_ID=39208" everything after the "?" is a query string.

Lets say your file name is script.php, lets say your query string is "?cmd=run", your piece of code will set $editFormAction to "script.php?cmd=run"

$_REQUEST: An associative array consisting of the contents of $_GET, $_POST, and $_COOKIE.
$HTTP_SERVER_VARS: Is an array containing information such as headers, paths, and script locations.