Question

I have a php file that produces a graph, populated through the answers of 4 sql statements, in another php file i have a simple loop that requests the image by posting a variable through session to a variable nested within the sql of the image file.

i have checked that the ‘sent’ variable is iterating through my loop… but the problem is that if i want to itterate by 2 the 2 images i get are of the last result instead of graph1, graph2, i get graph2, graph2…

is their something i missing? Please any help – very new to PHP thanks 🙂
heres the loop;

<?php
session_start();

for ($i = 1; $i < 3; $i++)
{
    $_SESSION['question'] = $i;
    ?>
    <div id="apDiv1"><img src="round.php"></div>
    <?php
}
?>

Answer 1

is their something i missing?

Yes, sessions in PHP are blocking. That means while your script in question runs, the round.php script does not run. It will wait until the script in question has finished.

More correctly: even longer. The output must even go to the browser first.

Then it provides you the graphs as images. The $_SESSION variable then is longtime to 2 already.

Instead pass a query parameter ($_GET parameter), $_SESSION does not work here.

<?php

for ($i = 1; $i < 3; $i++)
{     
    ?><div id="apDiv1"><img src="round.php?graph=<?php echo $i; ?>"></div><?php
}

?>