[PHP] assigning a part of the name of a variable with another variable before php replaces it with the value

[Matthew DeChant]

Specifically,

If I have 3 HTTP_POST_VARS:

HTTP_POST_VARS["client"] = test1
HTTP_POST_VARS["directory"]= test2
HTTP_POST_VARS["password"] =


and I don't know the names of the vars ahead of time, how would I run a
check to see if they exist and then get the specific POST_VARS's value. This
is what I've got so far:


$squery = "select * from $db where ";
$qh = fw_query("select * from $db");
        $fields = odbc_num_fields($qh);
        for ($i=1;$i<=$fields;$i++) {
                  # assign $fname the possible field names in the database
(client,directory,password)
                $fname[$i] = odbc_field_name($qh,$i);
                  # assign $postfld the variable name, ie. $HTTP_POST_VARS["client"]
                $postfld = $HTTP_POST_VARS["($fname[$i])"];
                  # check that it exists and is not blank
            if (isset($postfld) AND ($postfld != "")) {
                        $value[$i] = $postfld;
                        $squery.= "$fname[$i] like $value[$i] AND ";
                }
        }
        # pop last AND
        $squery= substr($squery, 0,-5);

so how do you make this work:  $postfld = $HTTP_POST_VARS["($fname[$i])"];

thanks,

-m


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