- time: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$interval1_start = 60 * 60 * 8; // 8am
$interval1_end = 60 * 60 * 12 -1; // 11:59:59am
$interval2_start = 60 * 60 * 12; // 12pm
$interval2_end = 60 * 60 * 16 -1; // 15:59:59pm
$interval3_start = 60 * 60 * 15; // 15pm
$interval3_end = 60 * 60 * 20 -1; // 15:59:59pm
$init_time = strtotime(date('Y-m-d'));
$cur_time = time();
$diff = $cur_time - $init_time;
if ($diff >= $interval1_start && $diff <= $interval1_end) {
echo 'code 1';
}
elseif ($diff >= $interval2_start && $diff <= $interval2_end) {
echo 'code 2';
}
elseif ($diff >= $interval3_start && $diff <= $interval3_end) {
echo 'code 3';
}