Cant get past IF statement to connect to database

[nander]

Hello I am creating a simple Discussion Forum, and I cant get past my IF Statement to verify topics exist? Please help?

 

<?php

 

//check for required info from the query string

if (!$_GET[topic_id]) {

header("Location: topiclist.php");

exit;

}

 

//connect to server and select database

$link = mysql_connect('votpservicescom.ipagemysql.com', 'mantest', 'testman')

    or die(mysql_error());

mysql_select_db("learn2db",$link) or die(mysql_error());

[jotorres1]

Try:

 

<?php

//check for required info from the query string
   if (!isset($_GET[topic_id])) {
      header("Location: topiclist.php");
         exit;
}

[Psycho]

You should also put quotes around the array index.

if (!isset($_GET['topic_id'])) {

 

If you are still not getting past that if() statement, then put this before the if statement for debugging purposes to see what, if any, values are present in the global $_GET array

echo "Get Vars:<pre>" . print_r($_GET) . "</pre>";
exit();

[jotorres1]

Wow, I didn't catch that either, you need the quotes 'topic_id' in order to get the value from url.  Nice find mjdamato

[nander]

mjdamato

 

I got this on the output

 

Array ( ) Get Vars:

1

 

[Psycho]

Oh, sorry, forgot the 2nd parameter for print_r(). Use this:

echo "Get Vars:<pre>" . print_r($_GET, true) . "</pre>";

[nander]

Ok here is what I get now?

 

Get Vars:

Array

(

)

 

 

Warning: Cannot modify header information - headers already sent by (output started at /hermes/bosweb25b/b904/ipg.votpservicescom/showtopic.php:3) in /hermes/bosweb25b/b904/ipg.votpservicescom/showtopic.php on line 7

 

[Psycho]

You have no values being passed in the $_GET array. Therefore the condition in you if() statement is resulting in true which causes the page to redirect.