Fatal error: Cannot redeclare head()

Donovan · Client Joined: Oct 07, 2003 Posts: 735 Location: Ohio

I have been round and round on this and cannot find my error. I think it has to do with my authentication. Let me explain.

I have a Peer Evaluation page for 1st and 2nd year medical students. First they authenticate with LDAP.

Code:

function AuthStudent() {

etc
etc
if ($db->sql_numrows($sql) == 1) {
// if a row was returned
   // authentication was successful
// set session variable
      $_SESSION['authuser'] = $authuser;
header("Location: modules.php?name=$module_name&op=nav");
}
}

nav is a function like so.

Code:

function nav() {
global $prefix, $module_name, $db;
include("header.php");
echo "<table border=\"1\" width=\"100%\" align=\"center\"><tr><td width=\"10%\">";
echo "<font class=\"content\">"
."<center><a href=\"modules.php?name=$module_name&op=TLM1StudentGrades\"><img src='modules/$module_name/images/M1icon.gif'\" border=\"0\" alt=\"Current Team Learning Grades\" title=\"First Year Courses\"></a><br>"
."<a href=\"modules.php?name=$module_name&op=TLM1StudentGrades\">First Year Courses</a>"
."</center></font></td>";

echo "<td width=\"10%\"><font class=\"content\">"
."<center><a href=\"modules.php?name=$module_name&op=TLM2StudentGrades\"><img src='modules/$module_name/images/courses.jpg'\" border=\"0\" alt=\"Peer Evaluations\" title=\"Second Year Courses\"></a><br>"
."<a href=\"modules.php?name=$module_name&op=TLM2StudentGrades\">Second Year Courses</a>"
."</center></font></td>";

echo "<td width=\"10%\"><font class=\"content\">"
   ."<center><a href=\"modules.php?name=$module_name&op=PeerEval\"><img src='modules/$module_name/images/test-icon.jpg'\" border=\"0\" alt=\"Submit Peer Evaluations\" title=\"Submit Peer Evaluations\"></a><br>"
   ."<a href=\"modules.php?name=$module_name&op=PeerEval\">Submit Peer Evaluations</a>"
   ."</center></font></td>";

echo "</tr></table>";
}

They can view scores from first or second year courses. They also click on "Submit Peer Evaluations" and it sends them to the proper page depending on which Class_Year they are in.

First year students complete peer eval after each course, while second year med students complete evals after each term.

Here is the Peer Eval function

Code:

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, or call her at xxx -xxxx.</td></tr>"
."<tr><td>If you are a second year medical student please email xxxxx at

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, or call her at xxx-xxxx.</td></tr>"
   ."<tr><td><input type=\"hidden\" name=\"op\" value=\"nav\">\n"
   ."<input type=\"submit\" value=\"Continue\"></form></td></tr></table><br>\n\n";
CloseTable();
exit();
}
}

if ($Class_Year == 2) {
//Get Term
$getTerm = $db->sql_fetchrow($db->sql_query("SELECT term, enabled, PE_start_time, PE_stop_time FROM ".$prefix."_tl_M2settings"));
$Term = $getTerm['term'];
$Term_Enabled = $getTerm['enabled'];
$start_time = $getTerm['PE_start_time'];
$stop_time = $getTerm['PE_stop_time'];
}
$today = time();
$start = strtotime($start_time);
$stop = strtotime($stop_time);
if (($Term_Enabled == '1') && ($today >= $start) && ($today <= $stop)){
TLM2PeerEvals($Term);
}else{
OpenTable();
echo "<br>\n"
   ."<form action='modules.php?name=$module_name' method='post'>"
   ."<table border=\"0\">"
   ."<tr><td>Team learning peer evaluations are not enabled or the time to complete an evaluation has expired.</td></tr>"
      ."<tr><td>Please email xxxx at

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, or call her at xxx-xxxx.</td></tr>"
   ."<tr><td><input type=\"hidden\" name=\"op\" value=\"nav\">\n"
   ."<input type=\"submit\" value=\"Continue\"></form></td></tr></table><br>\n\n";
CloseTable();
exit();
}

}

If it is a first year student I pass the $Course_Number and send them to TLAddM1PeerEvals.

If it is a second year student I pass $Term and send them to TLM2PeerEvals.

My case statement has this.

Code:

switch($op) {

case "AuthStudent":
AuthStudent();
break;

case "PeerEval":
PeerEval($authuser);
break;

case "TLAddM1PeerEvals":
TLAddM1PeerEvals($Course_Number);
break;

case "TLM2PeerEvals":
TLM2PeerEvals($Term);
break;

case "DisplayLogin":
DisplayLogin();
break;

case "nav":
nav();
break;

case "Logout":
Logout();
break;

}

My page starts with this.

Code:

require_once("mainfile.php");
$module_name = basename(dirname(__FILE__));
get_lang($module_name);

##################################################
# Start the session #
##################################################
session_start();
if (isset($_SESSION['authuser'])) {
$authuser = $_SESSION['authuser'];
} else {
$authuser = '';
}

Each time I try to enter Peer Eval as either a first or second year student I get the following:

Quote:

Fatal error: Cannot redeclare head() (previously declared in /Library/WebServer/Documents/atlas/header.php:2 Cool

in /Library/WebServer/Documents/atlas/header.php on line 47

I cannot find where I am including the header twice.

I think my authuser variable is getting stepped on and this is causing the Fatal error:.

Code:

if (!$authuser) {
header("Location: modules.php?name=$module_name&op=DisplayLogin");
exit;
}

Raven · Posted: Mon Sep 22, 2008 11:01 pm

Move session_start(); to the start of your script.