echo database data to html php pdo - php

Question

i have a database select on load of html on the select statement i select the last five in descending or here is the code
loadevent.php
<?php
function LoadEvent(){
global $dbh;
$stmt = $dbh->prepare("SELECT * FROM events ORDER by event_id DESC LIMIT 5") ;
//$stmt->bindValue(1,$eventwhat);
$stmt->execute();
while($selected_row = $stmt->fetch(PDO::FETCH_ASSOC)){
$_SESSION['searchresultwhat'] = $selected_row['event_what'];
$_SESSION['searchresultwhere'] = $selected_row['event_where'];
$_SESSION['searchresultwhen'] = $selected_row['event_when'];
$_SESSION['searchresultwho'] = $selected_row['event_who'];
$event = array($_SESSION['searchresultwhat'] => $selected_row['event_what'], $_SESSION['searchresultwhere'] =>$selected_row['event_where'], $_SESSION['searchresultwhen'] =>$selected_row['event_when'],$_SESSION['searchresultwho'] =>$selected_row['event_who']);
$_SESSION['arr'] = $event;
foreach ($_SESSION['arr'] as $_SESSION['searchresultwhat'] => $selected_row['event_what']){
echo $_SESSION['searchresultwhat'];
echo "<br/>\n";
}
}
}
?>
and in my html at top page i write
index.php
<?php include_once("include/loadevent.php");
LoadEvent();?>
in html my code is
<?php
foreach ($_SESSION['arr'] as $_SESSION['searchresultwhat'] => $selected_row['event_what']){
echo $_SESSION['searchresultwhat'];
echo "<br/>\n";
}
?>
when i do echo from loadevent.php i get the last five in descending order but in index all i get is the first event and nothing more why is it that way can anyone see where my mistake is?

Answer 1

You are doing some very odd things with the $_SESSION var, and as far as I can see there is no reason at all. Try this:
<?php
function LoadEvent()
{
global $dbh;
$stmt = $dbh->prepare("SELECT * FROM events ORDER by event_id DESC LIMIT 5") ;
$stmt->execute();
$events = array();
while ($selected_row = $stmt->fetch(PDO::FETCH_ASSOC))
{
$events[] = array(
'searchresultwhat' => $selected_row['event_what'],
'searchresultwhere' => $selected_row['event_where'],
'searchresultwhen' => $selected_row['event_when'],
'searchresultwho' => $selected_row['event_who']
);
}
// Is this just for testing? Or should it be echoing stuff all the time?
// foreach ($events as $key => $value)
// {
// echo $value['searchresultwhat'];
// echo "<br/>\n";
// }
// This is completely optional and should be removed if you don't
// use the $_SESSION method later on in your HTML
$_SESSION['arr'] = $events;
return $events;
}
?>
...and then in your HTML, do this:
<?php
foreach ($_SESSION['arr'] as $value)
{
echo $value['searchresultwhat'];
echo "<br/>\n";
}
?>
Or, even better in your index.php do this:
<?php
include_once("include/loadevent.php");
?>
Then in your HTML, you can avoid the $_SESSION all together:
<?php
foreach (LoadEvent() as $value)
{
echo $value['searchresultwhat'];
echo "<br/>\n";
}
?>

Answer 2

The simple solution would be to replace $_SESSION['arr'] = $event; with $_SESSION['arr'][] = $event; AND
foreach ($_SESSION['arr'] as $_SESSION['searchresultwhat'] => $selected_row['event_what']){
echo $_SESSION['searchresultwhat'];
echo "<br/>\n";
}
with
foreach ($_SESSION['arr'] as $value){
echo $value[$_SESSION['searchresultwhat']];
echo "<br/>\n";
}

Answer 3

in your 'while' loop you overwrite values in $_SESSION superglobal:
while($selected_row = $stmt->fetch(PDO::FETCH_ASSOC)){
//it is overwritten each time you are in while loop
$_SESSION['searchresultwhat'] = $selected_row['event_what'];
(...)
foreach ($_SESSION['arr'] as $_SESSION['searchresultwhat'] => $selected_row['event_what']){
//in this place when you echo it, it echoes current loop iteration so it is executed 5 times
echo $_SESSION['searchresultwhat'];
echo "<br/>\n";
}
}
being at index.php you do echo of last value only from while loop.