在一小时前一小时内获得前八个季度

Question

What i want to do, is display the last 8 quarters in an hour, one hour ago.

I already have this:

<?php
    echo date('d-m-Y H:i:s', strtotime('-1 hour'));
?>

For example:
Its now 14:46 (2:46 PM), so what i want, is this:

13:45
13:30
13:15
13:00
12:45
12:30
12:15
12:00

How can i get that?

Answer 1

<?php
$hour = date('G',(time()-(60*60)));
if (date('i') < 15)
    $min = array('00','45','30','15');
elseif (date('i') < 30)
    $min = array('15','00','45','30');
elseif (date('i') < 45)
    $min = array('30','15','00','45');
else
    $min = array('45','30','15','00');
for ($i=0;$i<=8;$i++) {
    if ($min[$i%4] == 45) {
        if ($hour == 0)
            $hour = 23;
        else 
            $hour--;
    }
    echo $hour.':'.$min[$i%4];
    echo '<br />';
}

Works right now, but I have not tested any further.

Local time: 15:06

Output:

14:00
13:45
13:30
13:15
13:00
12:45
12:30
12:15
12:00