A case of implementing a simple calendar in PHP

This article mainly introduces the simple calendar implementation method in PHP, involving the related calculation operations of PHP date and time. It is very simple and practical. Friends in need can refer to it

The screenshot of the running effect is as follows:

The specific code is as follows:

<?php
/*
 * Created on 2016-7-20
 */
SimCalendar('2016-08');//显示8月份日历
function SimCalendar($date)
{
  /**
   * 简单日历输出,本函数需要cal_days_in_month的支持
   * @param $date Y-m 要输出的日期
   */
  echo '<table border="1">
  <thead>
    <tr>
      <th>日</th>
      <th>一</th>
      <th>二</th>
      <th>三</th>
      <th>四</th>
      <th>五</th>
      <th>六</th>
    </tr>
  </thead>
  <tbody>';
    $date_array = explode('-', $date);
    $start_week = 0;//从星期天开始为0
    $month = cal_days_in_month(CAL_GREGORIAN, $date_array[1], $date_array[0]);//当月的天数
    $wstar = date('w', strtotime($date . '-01'));//当月从星期几天始
    $rows = ceil(($wstar + $month) / 7);//总行数
    $mday = 1;//第几天
    for ($i = 0; $i < $rows; $i++) {
      echo '<tr>';
      for ($d = 0; $d < 7; $d++) {
        $nowday = 7 * $i + $d + $start_week;
        if ($nowday >= $wstar && $mday <= $month) {
          $temp = date('d', strtotime($date . '-' . $mday));
          echo '<td>'.$temp . '</td>';
          $mday++;
        } else {
          echo '<td> </td>';
        }
      }
      echo '</tr>';
    }
  echo '</tbody>
</table>';
}
?>

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