Display 24 hours in a dropdown list using php - php

Question

I am trying to create a dropdown list for display time. My Option tag should be something like this
<option value="1">01.00AM</option>
<option value="2">02.00AM</option>
<option value="3">03.00AM</option> and so on
So Can I know is there a quick way to create the array instead of typing each hours in option tag?
NOTE: AM and PM should be display according to the time.
I tried it with this code, but it doesn't work for me..
<select>
<?php for($i = 0; $i < 24; $i++): ?>
<option value="<?= $i; ?>"><?= $i % 12 ? $i % 12 : 12 ?>:00 <?= $i >= 12 ? 'pm' : 'am' ?></option>
<?php endfor ?>
</select>

Answer 1

A slight variant on Fresh Prince's deleted answer
I give Fresh Prince of SO most of the credit for this one, but since he deleted his original answer I'm posting a variant of it without the mixed echo tags and weird concatenations.
<select id='time'>
<?php for($i = 1; $i <= 24; $i++): ?>
<option value="<?= $i; ?>"><?= date("h.iA", strtotime("$i:00")); ?></option>
<?php endfor; ?>
</select>
Note: I am using short echo tags <?= because the original post used them. I'd recommend replacing these with <?php echo if you're writing portable code that needs to support older versions of PHP.
Output format
The output format from this script is:
<select id='time'>
<option value="1">01.00AM</option>
<option value="2">02.00AM</option>
...
<option value="23">11.00PM</option>
<option value="24">12.00AM</option>
</select>
This is a live demo.

Answer 2

Why not just use strtotime and date?
date("h.iA", strtotime($i . ":00"))
See a demo
Working it into your example,
<?php
for($i = 0; $i < 24; $i++):
echo "<option value=\"$i\">" . date("h.iA", strtotime($i . ":00")) . "</option>\n";
endfor;
?>
Alternatively,
<?php
for($i = 0; $i < 24; $i++, $d = date("h.iA", strtotime($i . ":00:00"))) {
echo "<option value=\"$i\">$d</option>\n";
}
?>
Lastly,
for($i = 0; $i < 24; print "<option value=\"$i\">" . date("h.iA", strtotime($i . ":00:00")) . "</option>\n", $i++);
See a demo

Answer 3

Checkout the following demo: http://phpfiddle.org/main/code/8y7-hut In-which sprintf formating features are used to fill preleading 0.
The following is the code used:
<select>
<?php for($i = 0; $i < 24; $i++): ?>
<option value="<?php echo $i+1; ?>"><?php printf('%1$02d.00',(($i+1) > 12)? ($i+1)-12 : $i+1)?><?php echo (($i < 12)? 'AM' : 'PM'); ?></option>
<?php endfor ?>
</select>

Answer 4

No need for all those messy php tags.
for ($i=0; $i<24; ++$i) {
$t = date("H.iA", strtotime($i.":00:00"));
echo '<option value="'.$i.'">'.$t.'</option>';
}

Answer 5

Try this:
$start = '12:00AM';
$end = '11:59PM';
$interval = '+1 hour';
// $interval = '+30 minutes';
// $interval = '+15 minutes';
$start_str = strtotime($start);
$end_str = strtotime($end);
$now_str = $start_str;
echo '<select>';
while($now_str <= $end_str){
echo '<option value="' . date('h:i A', $now_str) . '">' . date('h:i A', $now_str) . '</option>';
$now_str = strtotime($interval, $now_str);
}
echo '</select>';
Here's a working example.