time increment

fnbcprog

What I am trying to accomplish is how to create a drop down box with values that are incremented every 15 minutes starting from 12:00 midnight to 11:45 PM???

Right now I have:

// Return time in 15 minute increments starting at 8:00 ante-meridian (AM)
function generate_event_times() {
	global $cfg;

$start_time = 8;

$tag = "<select name=\"\">";
for($i=0; $i <= 57600; $i+=900) {
	$tag .= "<option value=\"". date("H:i A",$i) ."\">". date("H:i",$i) ."</option>";
}

return $tag;
}

However that is not working for anything so if you could please help me out that would be fantastic!!!!

Thanks,

Installer

$tod = strtotime('12am');
for ($i = 0; $i < ((24 * 4) - 1); $i++) {
    $tod += (15 * 60);
    echo date('H:i A', $tod) . '<br />';
}

Edit: sorry, no comments.

Weedpacket

well - it's going to be 00:00 to 23:45, right? It's overkill to use date() here, unless you want to take Daylight Saving into account, and that depends on the entire date and the relevant territory's protocols - not just the time of day. Without worrying about it, it's just a pair of nested loops.

So leaving DST aside:

echo "<select>";
for($hours=0; $hours<24; $hours++)
	for($minutes=0; $minutes<60; $minutes+=15)
		printf("<option>%2d:%2d</option>",$hours,$minutes);
echo "</select>";

Installer

Sorry, I realized my solution didn't show your starting time (12:00 AM). Here's the corrected version:

$start = strtotime('12am');
for ($i = 0; $i < (24 * 4); $i++) {
    $tod = $start + ($i * 15 * 60);
    echo date('H:i A', $tod) . '<br />';
}

Edit: I guess it still doesn't (00:00 AM). There should be a work-around, though.

Edit again: What the heck. Here:

if ($_POST['submit']) {
    echo $_POST['time'];
}
echo '<br /><br />';
echo '<form action="' . $_SERVER['PHP_SELF'] . '" method="post">';
echo '<select name="time">';
$start = strtotime('12am');
for ($i = 0; $i < (24 * 4); $i++) {
    $tod = $start + ($i * 15 * 60);
    $display = date('h:i A', $tod);
    if (substr($display, 0, 2) == '00') {
        $display = '12' . substr($display, 2);
    }
    $tag = '<option value="' . $display . '">' . $display . '</option>';
    echo $tag;
}
echo ' <input type="submit" value="submit" name="submit" />';
echo '</select></form>';