php foreach inside for statement problems - php

Question

Sorry if this has been asked before however I am having trouble finding the answer to my problem.
I am trying to build a calendar system and schedule system for my web application in PHP and having difficulty with one particular area.
I have a "for" statement where it will draw up the times of the day starting at 12:00AM and finishing at 11:30PM
Inside this for loop, I have a foreach which i want to echo out the objects in an array that match a particular time.
Everything I have tried which includes using for,while and foreach statements don't show what I am after which is the events lining up next to the time.
here is my code
<?php
$tStart = strtotime($start_time);
$tEnd = strtotime($end_time);
$tNow = $tStart;
while($items = mysql_fetch_object($result)){
$events[] = $items;
}
for($tNow=$tStart; $tNow<$tEnd; $tNow=strtotime('+30 minutes',$tNow)){
// Time to color the rows to make it easier to read
if(!isset($day_row)){
$day_row = "0";
}
if(isset($day_row) && $day_row >= "2"){
$day_row--;
}
else{ $day_row++;
}
//This bit draws the first column.
echo "<tr><td class=\"day_row".$day_row."\" width=\"70px\">".date("h:i A",$tNow)."</td>";
// MySQL stuff is now here
foreach($events as $e => $item){
if($item->apnt_start == $tnow){
$rowspan = ((strtotime($item->apnt_finish)-strtotime($item->apnt_start))/"1800");
echo "<td class=\"day_row_apnt\" rowspan=\"$rowspan\">".$item->apnt_start."-".$item->apnt_finish." ".$item->apnt_brief."</td></tr>";
}
}
}
?>
at present i am given a page with
12:00 AM
12:30 AM
01:00 AM
01:30 AM
02:00 AM
02:30 AM
03:00 AM
03:30 AM
04:00 AM
04:30 AM
05:00 AM
05:30 AM
Next to the time I want the appointment with matching time.
I am trying to achieve something similar to http://mrbs.sourceforge.net/
I can't use their system however as I can't integrate it properly and I have tried looking at their code and it seems to be pointing at many files and i am having trouble trying to understand the function i am after.
Please let me know if this is not clear enough and will try to explain further.

Answer 1

You need to define and set value for variables below:
$start_time = "09:00 AM";
$end_time = "11:30 PM";
Also you need to add query and database connection (above while($items = mysql_fetch_object($result)){ statement):
mysql_connect("hostname", "user", "password");
mysql_select_db("mydb");
$result = mysql_query("select * from mytable");
EDIT:
You should use while mysql_fetch_assoc instead of mysql_fetch_object.
Replace
while($items = mysql_fetch_object($result)){
with
while($items = mysql_fetch_assoc($result)){
Delete: $events[] = $items;
Ensure your while statement above ends after all code is executed (code you listed in your question) - closing bracket }.

Answer 2

Okay, this should work for you.
<?php
$tStart = strtotime($start_time);
$tEnd = strtotime($end_time);
$tNow = $tStart;
echo '<table>';
while($events = mysql_fetch_assoc($result)){
for($tNow=$tStart; $tNow<$tEnd; $tNow=strtotime('+30 minutes',$tNow)){
// Time to color the rows to make it easier to read
if(!isset($day_row)){
$day_row = "0";
}
if(isset($day_row) && $day_row >= "2"){
$day_row--;
}
else{ $day_row++;
}
//This bit draws the first column.
echo "<tr><td class=\"day_row".$day_row."\" width=\"70px\">".date("h:i A",$tNow)."</td>";
if(strtotime($events['apnt_start']) == $tNow) {
$rowspan = ((strtotime($events->apnt_finish)-strtotime($events->apnt_start))/"1800");
echo "<td class=\"day_row_apnt\" rowspan=\"$rowspan\">".$events->apnt_start."-".$events->apnt_finish." ".$events->apnt_brief."</td></tr>";
}
} //end for
} //end while
echo '</table>';
?>

Answer 3

I would like to thank everyone that provided advice on this issue, I have finally got it working with added another variable and using a method of storing an array in an array.
The final code looks like
<?php
$tStart = strtotime($start_time);
$tEnd = strtotime($end_time);
$tNow = $tStart;
$events = array();
$eas = "0"; // eas stands for Event Array Start. this will be used to cycle through the events in the array.
while($items = mysql_fetch_assoc($result)){
$events[] = $items;
}
for($tNow=$tStart; $tNow<$tEnd; $tNow=strtotime('+30 minutes',$tNow)){
// Time to color the rows to make it easier to read
if(!isset($day_row)){
$day_row = "0";
}
if(isset($day_row) && $day_row >= "2"){
$day_row--;
}
else{ $day_row++;
}
//This bit draws the first column.
echo "<tr><td class=\"day_row".$day_row."\" width=\"70px\">".date("h:i A",$tNow)."</td>";
if(strtotime($events[$eas]['apnt_start']) == $tNow) {
$rowspan = ((strtotime($events[$eas]['apnt_finish'])-strtotime($events[$eas]['apnt_start']))/"1800");
echo "<td class=\"day_row_apnt\" rowspan=\"$rowspan\" >".$events[$eas]['apnt_start']."-".$events[$eas]['apnt_finish']." ".$events[$eas]['apnt_brief']."</td></tr>";
$eas++;
}
else{
echo "<td class=\"day_row".$day_row."\"></td>";
}
} //end for
?>
By using the variable $eas I was able to then control which number it would start at by setting it to 0 initially and then when it found an entry with a matching time it went through the if statement where at the end of the if statement it was given $eas++ to increment.
This then proved that if there was no appointment the $eas would not run and it would not increment thus remaining on the last incremented $eas.
Thanks again for everyone's help.