Start counting weeks from specific month - php

Question

Im trying to write php code which would start counting weeks from specific month. For me its September and February. For example desired result for 01.09.2017 would be Semester-1,Week-1. and for 04.09.2017 would be Semester-1,Week-2. I found similar topics here and here . But their output result is array, should i work with arreys here too ? I want to mention that I almost have zero expierence with php language.
This is what I have come up with so far:
<?php
$day = date("D");
$month = date("M");
if($month == 'Apr'||'Feb'||'Mar'||'May') {
print "Semester-2,";
}
else print "";
if($month == 'Sep'||'Oct'||'Nov'||'Dec') {
print "Semester-1,";
}
else print "";
if($month == 'Jan') {
print "Exams";
}
if($month == 'Jun') {
print "Exams,";
}
if($month == 'Jun') {
print "Exams,";
}
if($month == 'Jul'||'Aug') {
print "Summer Break,";
}

Answer 1

You could do something like this:
$month = date('n'); // Month number 1-12
if ($month >= 9 && $month <=12) {
$period = 'Semester-1';
$startWeek = date('W', strtotime(date('Y') . '-09-01'));
} elseif ($month >= 2 && $month <=5) {
$period = 'Semester-2';
$startWeek = date('W', strtotime(date('Y') . '-02-01'));
} elseif ($month == 1) {
$period = 'Exams';
$startWeek = date('W', strtotime(date('Y') . '-01-01'));
} elseif ($month == 6) {
$period = 'Exams';
$startWeek = date('W', strtotime(date('Y') . '-06-01'));
} elseif ($month == 7 || $month == 8) {
$period = 'Summer break';
$startWeek = date('W', strtotime(date('Y') . '-07-01'));
}
$currentWeek = date('W') - $startWeek + 1;
echo $period . ' ' . 'Week-' . $currentWeek;

Answer 2

After #Qirel comment, I thought of something like this, hope this helps :
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
$month = date("M"); /* current month */
if (in_array($month, array("Sep", "Oct", "Nov", "Dec"))) { $myperiod = "Semester #1"; }
if (in_array($month, array("Feb", "Mar", "Apr", "May"))) { $myperiod = "Semester #2"; }
if($month == 'Jan') { $myperiod = "Mid-Exams #1"; }
if($month == 'Jun') { $myperiod = "Final-Exams #2"; }
if( ($month == 'Jul') || ($month == 'Aug') ) { $myperiod = "Summer break"; }
$today = date("Y-m-d"); /* or use your date from user data */
$date = new DateTime($today);
$week = $date->format("W"); /* use of PHP function 'date' to get week # */
$currentweek = "$week";
echo "[ Week # $week ]";
echo"You currently are in : $myperiod - $currentweek";
?>

Answer 3

This should give you what you need:
$semesters = array(
'Sep' => 'Semester-1',
'Oct' => 'Semester-1',
'Nov' => 'Semester-1',
'Dec' => 'Semester-1',
'Jan' => 'Exams',
'Feb' => 'Semester-2',
'Mar' => 'Semester-2',
'Apr' => 'Semester-2',
'May' => 'Semester-2',
'Jun' => 'Exams',
'Jul' => 'Summer Break',
'Aug' => 'Summer Break',
);
switch ($semesters[date('M')]) {
case 'Semester-1':
$sep1st = strtotime('2017-09-01');
$week1 = date('W', $sep1st);
$currentWeek = date('W');
echo 'Semester-1, Week-', $currentWeek - $week1 + 1; // +1 because the count starts at 1.
break;
case 'Semester-2':
$feb1st = strtotime('2018-02-01');
$week1 = date('W', $feb1st);
$currentWeek = date('W');
echo 'Semester-2, Week-', $currentWeek - $week1 + 1; // +1 because the count starts at 1.
break;
default:
echo $semesters[date('M')];
break;
}
Note that this can be refactored into smaller, more semantic parts.