PHP tables not printing out? - php

Question

I'm calling a specific function, either getTaskList0, getTaskList1, or getTaskList2, each the same as below, with the number after task referring to the getTaskList number (in TaskManagerDAO):
function getTaskList0(){
$lst=array();
$con=$this->getDBConnection();
$result = $con->query("SELECT name, score FROM task0 ORDER BY score DESC");
$i = 0;
$counter=0;
while (($row =$result->fetch_row()) && ($counter<5)) {
$rec = new Task($row[0],$row[1]);
$lst[$i++]=$rec;
$counter++;
}
return $lst;
}
Task:
<?php
class Task{
public $name;
public $score;
function __construct($name,$score) {
$this->name = $name;
$this->score = $score;
}
}
The function is called in here:
<?php
session_start();
if(!class_exists('Action')){
include_once 'Action.php';
}
if(!class_exists('TaskManagerDAO')){
include_once 'TaskManagerDAO.php';
}
class Action_DisplayList implements Action{
public function execute($request){
if(!isset($_SESSION['functCount']))
$_SESSION['functCount']=0;
$functCount=$_SESSION['functCount'];
$functionName="getTaskList{$functCount}";
echo $functionName;
$dao = new TaskManagerDAO();
$names = $dao->$functionName();
$_SESSION['names'] = $names;
$last = sizeof($names);
$start = 0;
$_SESSION['start'] = $start;
$_SESSION['last'] =$last;
header("Location: tasklist.php");
}
}
?>
I'm trying to call the function by putting a variable at the end of the function name as a string and then calling the function. This works as I don't get any errors, but the list does not show up in the table, which is what this code is supposed to do:
<?php
if(isset($_POST['Add']) && ($_POST['name']!=="") &&!empty($_POST['Add'])){
include 'Action_Add.php';
Action_Add::execute();
}
$functCount=0;
$_SESSION['functCount']=0;
$names = $_SESSION['names'];
$start=$_SESSION['start'];
$last = $_SESSION['last'];
for($count = $start; $count < $last; $count++){
$name=$names[$count];
echo "<tr>";
echo "<td>".($count+1)."</td>";
echo "<td>".$name->name."</td>";
echo "<td>".$name->score."</td>";
echo "</tr>";
}
?>
EDIT:
I restarted my computer and everything and for the first run load of the page it worked perfectly. After that though, it stopped working though.

Answer 1

Use session_start(); before start using $_SESSION. So in your case, try something like
<?php
session_start();
if(isset($_POST['Add']) && ($_POST['name']!=="") &&!empty($_POST['Add'])){
//.... remaining code here
Note: To use cookie-based sessions, session_start() must be called before outputing anything to the browser.