PHP判斷目前時間是否在某一時間段内

<?php
 
function get_curr_time_section()
{
    $checkDayStr = date('Y-m-d ',time());
    $timeBegin1 = strtotime($checkDayStr."09:00".":00");
    $timeEnd1 = strtotime($checkDayStr."18:00".":00");
   
    $curr_time = time();
   
    if($curr_time >= $timeBegin1 && $curr_time <= $timeEnd1)
    {
        return 0;
    }
    
    return -1;
}
 
    $result = get_curr_time_section();
    echo $result;
 
?>