PHP show range of hours and ignore past time - php

Question

I am trying to make a little script which shows range of hours between 11:00 and 17:00. 11:00 is start point and 17:00 is end point. So far i have made this:
<?php
// Defining hours
$now = "13:00"; // <- my time now
$start_time = "11:00"; // start point
$end_time = "17:00"; // end point
// Convert to timestamps
$begin = strtotime($start_time);
$end = strtotime($end_time);
// Display range
while($begin <= $end) {
echo date("H:i", $begin)." </br />";
$begin = strtotime('1 hour', $begin);
}
?>
And it successfully output of range between start and end points:
11:00
12:00
13:00
14:00
15:00
16:00
17:00
My goal is to make this script show range of hours from 13:00 (my time) if actual time is more than start time (11:00). Something like this:
11:00 hidden
12:00 hidden
13:00
14:00
15:00
16:00
17:00
Can someone suggest how to make it?

Answer 1

In this case simply use this:
$present = strtotime($now);
if($present > $begin){
$begin = $present;
}
but what you need if say $now = 18:00 or beyond this.
In this case this code show nothing.

Answer 2

I think you can simplify your whole solution. Instead of using time operations, why don't you simply increase a variable from current hour or 11 to 17. To determine $begin simply use max(), like this:
$begin = max(date('H'), 11);
$end = 17;
while($begin <= $end) {
echo $begin . ':00<br>';
$begin++;
}

Answer 3

I have added small bits as #user1234 suggested and now it works as i wanted. Here is the full code for reference to others.
<?php
// Defining hours
$now = "13:00"; // <- my time now
$start_time = "11:00"; // start point
$end_time = "17:00"; // end point
// Convert to timestamps
$actual = strtotime($now);
$begin = strtotime($start_time);
$end = strtotime($end_time);
// Added this to see if actual time is more than start time - creadit user1234
if($actual > $begin) {
$begin = $actual;
}
// Added this to see if actual time is more than 17:00
if($actual > $end) {
echo "Try tomorrow";
}
// Display ranges accordingly.
while($begin <= $end) {
echo date("H:i", $begin)." </br />";
$begin = strtotime('1 hour', $begin);
}
?>
Anyone is welcome to test and use if needed.