How to set GET POST and REQUEST strings dynamically - php

Question

Okay So for awhile I have been attempting to set GET POST and REQUEST variables dynamically.
I store the variables I want it to get or post or request inside an sql table. each variable has it's own column. In this same row it records the type I want it to try to use(GET,POST,REQUEST). I am telling you this so you see how I want to go about doing this.
Source
$snmpbq=$os_DB->query("SELECT * FROM `spiders` WHERE site = '".$site_name."'") or die(mysql_error());
$num=$os_DB->num($snmpbq);
if($num == 1)
{
//get row as an associative array
$pb=$os_DB->fetch($snmpbq);
//data request type
$req_type = $pb['net_req_type'];
$a1 = $pb['a'];
$b1 = $pb['b'];
$c1 = $pb['c'];
$d1 = $pb['d'];
$e1 = $pb['e'];
$f1 = $pb['f'];
if($req_type == "get")
{
$a = $_GET[$a1];
$b = $_GET[$b1];
$c = $_GET[$c1];
$d = $_GET[$d1];
$e = $_GET[$e1];
$f = $_GET[$f1];
}

Answer 1

You can accomplish this in a much cleaner way by replacing the blocks with 1 block... rather then checking the request type.
If you remove all your blocks and replace with:
$a = $_REQUEST[$a1];
$b = $_REQUEST[$b1];
$c = $_REQUEST[$c1];
$d = $_REQUEST[$d1];
$e = $_REQUEST[$e1];
$f = $_REQUEST[$f1];
As per the PHP Documents here
The variables in $_REQUEST are provided to the script via the GET, POST, and COOKIE input mechanisms and therefore could be modified by the remote user and cannot be trusted. The presence and order of variables listed in this array is defined according to the PHP variables_order configuration directive.

Answer 2

Sounds like you need to use a variable variable.
$result = 'someDataBaseQueryResult';
$$result = 'cool'; // now $someDataBaseQueryResult === 'cool'

Answer 3

You question is a bit confusing, but you could take this to the nth degree.
Idea for the sample code:
$sReq = $pb['net_req_type'];
foreach($pb as $key => $value) {
if($key == 'net_req_type')
continue;
${$key} = $_GET[$value];
}
It's a little late, and I'm a little drunk, but I think that may be close. Haven't executed it though...