Ptps controller 6

src/Action/Functions.php

@@ -6,6 +6,9 @@ namespace App\Action;
 
 use Exception;
 use DateTimeImmutable;
+use DateTime;
+use DatePeriod;
+use DateInterval;
 
 class Functions
 {
@@ -100,4 +103,21 @@ class Functions
         $dateInterval = date_diff(new DateTimeImmutable($endYear), $date);
         return (int)$dateInterval->format("%a") + 1;
     }
+
+    /**
+     * Вернет все пятницы 13 в году
+     * @param int $year год, в котором необходимо произвести расчет
+     * @return DateTimeImmutable[]
+     * @throws Exception
+     */
+    public function countFriday13(int $year): iterable
+    {
+        $startDate = new DateTime("$year-01-01 Friday");
+        ++$year;
+        $endDate = new DateTime("$year-01-01");
+        $interval = new DateInterval('P7D');
+        foreach (new DatePeriod($startDate, $interval, $endDate) as $day) {
+            yield new DateTimeImmutable($day->format("Y-m-d"));
+        }
+    }
 }
\ No newline at end of file