Pulling in data around/after midnight - php

Question

Ok.. so I've created myself a messy problem.
So I have a jquery slider that shows 5 slides of content
1) -2 hours ago
2) -1 hour ago
3) (0) present
4) +1 hours
5) +2 hours
The content for each slide is decided by what time of day it is. However when it comes to trying to go back/forwards 1 to 2 hours during the run up to midnight and after midnight the whole script breaks, and kills the site.
<?php
$h = date('G', strtotime ("-2 hour")); //set variable $h to the hour of the day.
$m = date('i', strtotime ("-2 hour")); //set variable $m to the min of the hour.
$d = date('w', strtotime ("-2 hour")); //set variable $d to the day of the week.
// SATURDAY SCHEDULE
if ($d == 6 && $h >= 0 && $h < 07) $file ='earlyhours.php';
else if ($d == 6 && $h >= 07 && $h < 09) $file ='breakfast.php';
else if ($d == 6 && $h >= 09 && $h < 12) $file ='throughthemorning.php';
else if ($d == 6 && $h >= 12 && $h < 13) $file ='rewind.php';
else if ($d == 6 && $h >= 13 && $h < 17 && $m <= 30) $file ='nonstop.php';
else if ($d == 6 && $h >= 17 && $m >= 30 && $h <21) $file ='livetrend.php';
else if ($d == 6 && $h >= 17 && $m >= 35 && $h < 21) $file ='nonstop.php';
else if ($d == 6 && $h >= 21 && $h < 18) $file ='gennation.php';
else if ($d == 6 && $h >= 23) $file ='earlyhours.php';
else if ($d == 7 && $h >= 0) $file ='earlyhours.php';
require $_SERVER['DOCUMENT_ROOT'] . '/collection/profiles/' . $file . '';
?>
As you can see it figures the time and then drops the correct file in - there's five of these for everyday of the week (-2.php, -1.php, 0.php, 1.php, 2.php).
Does anybody have a solution? Ideally I need to stop the break, but I don't want my visitors to be scrolling +1 / 2 or -1 / 2 hours on for the same days rotation when it nears, and steps over midnight.
For example, right now the code is broken on -2.php until at least 2am (my timezone) so that it back track.
I've totally burnt myself out trying to figure this one out.

Answer 1

The problems arising from the change of day can become intractable. I'd tackle this a different way. Start by calculating the day and hour for the five periods your interested in and use DateTime to do the heavy lifting. Then, use a function to provide the schedule item for a particular day/time combination.
Here's a skeleton
<?php
date_default_timezone_set('Pacific/Auckland');
$now = new DateTime();
$oneHour = new DateInterval('PT1H');
$minusOne = (clone $now);
$minusOne->sub($oneHour);
$minusTwo = (clone $minusOne);
$minusTwo->sub($oneHour);
$plusOne = (clone $now);
$plusOne->add($oneHour);
$plusTwo = (clone $plusOne);
$plusTwo->add($oneHour);
echo returnFile($minusTwo);
echo returnFile($minusOne);
echo returnFile($now);
echo returnFile($plusOne);
echo returnFile($plusTwo);
function returnFile(DateTime $t) {
$day = $t->format('D');
$hour = $t->format('G');
// echo "Day:$day, Hour: $hour;<br>";
switch ($day) {
case 'Mon':
if ($hour<7) {
// Small hours Monday...
$filename = "smallMonday.html";
break;
}
if ($hour<12) {
// Monday morning
$filename = "morningMonday.html";
break;
}
break;
case 'Tue':
if ($hour >=23) {
// Late Tuesday
$filename = "lateTuesday.html";
}
default:
$filename = "Some other time";
}
return $filename;
}
?>
I haven't put in a complete schedule - you can work that out.
If you're using PHP 5.5 or later you can use DateTimeImmutable instead of DateTime which does away with all the cloning.
There's a fiddle here

Answer 2

Get rid of the leading zeros in your comparisons. Those are octal numbers and not decimals. You won't get the results you expect.
// 09 is not a valid octal number. It gets converted to zero in decimal.
else if ($d == 6 && $h >= 07 && $h < 09)
..
else if ($d == 6 && $h >= 09 && $h < 12) $file ='throughthemorning.php';