<?php
    $abFirstExam = 0;
    $absecondExam = 0;
    $abThirdExam = 0;
    $abFourthExam = 0;

    $absences = array(
      '0' => 0,
      '1' => 0,
      '2' => 0,
      '3' => 0,
    );

    $studentAttendance = $this->db->get_where('attendance', array(
      'section_id' => $section_id,
      'class_id' => $class_id,
      'year' => $running_year,
      'student_id' => $student_id
    ))->result_array();

    for ($i = 1; $i <= 12; $i++) {
      $year = explode('-', $running_year);
      $days = cal_days_in_month(CAL_GREGORIAN, $i, $sessional_year);
      for ($d = 1; $d <= $days; $d++) {
        $timestamp = strtotime($d . '-' . $i . '-' . $sessional_year);

        $attendance = array_filter($studentAttendance, function($v) use ($timestamp) {
          return ($v['timestamp'] == $timestamp);
        });

        for ($ab = 0; $ab < sizeof($attendance); $ab++) {
          if ($attendance[$ab]['status'] == 2) {
            $attd = gmdate("Y-m-dTH:i:sZ", $attendance[$ab]['timestamp']);
            $attTimestamp = new DateTime($attd);
            // echo $attTimestamp->format('d/m/Y');

            $dateBegin = new DateTime($period_data->first_start);
            $dateEnd  = new DateTime($period_data->first_end);

            if ($attTimestamp->getTimestamp() > $dateBegin->getTimestamp() && $attTimestamp->getTimestamp() < $dateEnd->getTimestamp())
              $absences[0]++;

            $dateBegin = new DateTime($period_data->second_start);
            $dateEnd  = new DateTime($period_data->second_end);

            if ($attTimestamp->getTimestamp() > $dateBegin->getTimestamp() && $attTimestamp->getTimestamp() < $dateEnd->getTimestamp())
              $absences[1]++;

            $dateBegin = new DateTime($period_data->third_start);
            $dateEnd  = new DateTime($period_data->third_end);

            if ($attTimestamp->getTimestamp() > $dateBegin->getTimestamp() && $attTimestamp->getTimestamp() < $dateEnd->getTimestamp())
              $absences[2]++;

            $dateBegin = new DateTime($period_data->fourth_start);
            $dateEnd  = new DateTime($period_data->fourth_end);

            if ($attTimestamp->getTimestamp() > $dateBegin->getTimestamp() && $attTimestamp->getTimestamp() < $dateEnd->getTimestamp())
              $absences[3]++;
          }
        }
      }
    }
    ?>

<div class="col-xs-5" style="padding-left: 0px;">
    <div style="margin-left: -1px" class="col-xs-3 header-goal text-center border-bottom border-left">
        <?php
        $abFirstExam = $absences[0];

        print_r($abFirstExam);
        ?>
    </div>
    <div style="margin-left:  0px" class="col-xs-3 header-goal text-center border-bottom border-left">
      <?php
      $absecondExam = $absences[1];

      print_r($absecondExam);
      ?>
    </div>
    <div style="margin-left:  0px" class="col-xs-3 header-goal text-center border-bottom border-left">
      <?php
        $abThirdExam = $absences[2];

        print_r($abThirdExam);
      ?>
    </div>
    <div style="margin-left:  1px" class="col-xs-3 header-goal border-left text-center border-bottom border-right">
      <?php
        $abFourthExam = $absences[3];

        print_r($abFourthExam);
      ?>
    </div>