Loop for Agenda with day hours and fill data from DB - php

Question

I am stuck and I guess is a loop issue, can someone help me out here and tell me what is it that I am doing wrong? This is what I have:
$this->time = mktime(7,0,0,$this->date);
for($i=1;$i<56;$i++) {
echo '<tr><td>' . date('H:i', $this->time) . '</td>';
while($this->results = $this->sql->fetch(PDO::FETCH_ASSOC)){
if (date('H:i:s', $this->time) != $this->results['time']) {
$this->agenda = '<td>' . $this->results['name'] . '</td></tr>';
} else {
$this->agenda = '<td>This Hour is free</td></tr>';
}
echo $this->agenda;
}
$this->time += 900;
}
What I am trying to do and get is:
Display a range of time from 7am to 8:30pm using 24 hours format, also the hours should split every 15min, that's why I incremented the for loop on 900.
on the hours that match the db, show the name of the person, other wise show This Hour is free.
But I am having trouble with the table and loop/bucle order
Thanks and appreciate it

Answer 1

I hope this might be of use - it uses the DateTime, DateTimeZone and DateInterval classes but doesn't incorporate your code to check the db results - that should be fairly straightforward.
<?php
define('BR','<br />');
$df='H:i';
$timezone=new DateTimeZone('Europe/London');
$interval=new DateInterval('PT15M');
$ts=date( 'Y-m-d H:i:s', strtotime('6.45am') );
$tf=date( 'Y-m-d H:i:s', strtotime('8.30pm') );
$start=new DateTime( $ts, $timezone );
$end=new DateTime( $tf, $timezone );
while( $start->add( $interval ) <= $end ){
echo $start->format( $df ) . BR;
}
$timezone=$interval=$ts=$tf=$start=$end=null;
?>