如何使用if语句显示属于日期范围的记录

Question

I want to display all the records during August of the current year up to December of the current year. While it will not display on January up to June, Instead the Records of January up to June will be displayed. How will I catch the date using IF statement?

Here is my code:

            $year = date("Y");
            $sem1_start = date("M-d-Y", strtotime("August, 01".$year));
            $sem1_end = date("M-d-Y", strtotime("December, 31".$year));

            $sem2_start = date("M-d-Y", strtotime("January, 01".$year));
            $sem2_end = date("M-d-Y", strtotime("June, 15".$year));

            //sample date from database
            $date = '2015-10-15';
            $date2 = date("M-d-Y", strtotime($date));


            if($date2 >= $sem1_s && $date2 <= $sem1_e){
                //Display all records
            }
            else if($date2 >= $sem2_s && $date2 <= $sem2_e){
                 //Display all records
            }

I wanted to automatically display the records of the current semester (August-December) and when January comes, it will hide the records but will display the records of the second semester which is January up to June.

Answer 1

You could filter your sql result with the between statement. Something like

$query = "select * from db_table where datefield BETWEEN $startdate and $enddate order by datefield asc;

That way your results will always fall in range and are sorted to boot

Answer 2

I think, in the database I have a field to save valuable time

$time = time();

When I want to search from August of the current year to March 12 of the current year I will do the following

$timeSearchStart = strtotime(date('Y') . '-8-1 00:00:00');
$timeSearchEnd = strtotime(date('Y') . '-12-31 23:59:59');
$query = "SELECT * FROM `table` WHERE `fieldSaveTime` > '" . $timeSearchStart . "' && `fieldSaveTime` < '" . $timeSearchEnd  . "'";