日历预订系统出错 [英] Error in calendar booking system

问题描述

我在PHP中有一个日历预订系统，以下是它的代码片段。
我正在运行WampServer2.4

I have a 'calendar booking system' in PHP and below are code snippets of that. I am running WampServer2.4

<?
include('php/connect.php'); 
include('classes/class_calendar.php');

$calendar = new booking_diary($link);

if (isset($_GET['month'])) $month = $_GET['month']; else $month = date("0");
if (isset($_GET['year'])) $year = $_GET['year']; else $year = date("0");
if (isset($_GET['day'])) $day = $_GET['day']; else $day = 0;

$selected_date = mktime(0, 0, 0, $month, 01, $year); // Make a timestamp based on the GET values
$first_day = date("N", $selected_date) - 1; // Gives numeric representation of the day of the week 1 (for Monday) through 7 (for Sunday)
$back = strtotime("-1 month", $selected_date);
$forward = strtotime("+1 month", $selected_date);

?>

和

<?php     

if($_SERVER['REQUEST_METHOD'] == 'POST') {
    $calendar->after_post($month, $day, $year);  
}   

// Call calendar function
$calendar->make_calendar($selected_date, $first_day, $back, $forward, $day, $month, $year);

?>

而且函数是

function make_calendar($selected_date, $first_day, $back, $forward, $day, $month, $year) {

    // Add a value to these public variables  
    $this->day = $day;    
    $this->month = $month;
    $this->year = $year;

    $this->selected_date = $selected_date;    
    $this->first_day = $first_day;

    $this->back = $back;
    $this->back_month = date("m", $back);
    $this->back_year = date("Y", $back); // Minus one month back arrow

    $this->forward = $forward;
    $this->forward_month = date("m", $forward);
    $this->forward_year = date("Y", $forward); // Add one month forward arrow    

    // Make the booking array
    $this->make_booking_array($year, $month);

}

运行代码，我得到这个恼人的错误。

But when I try to run the code, I am getting this annoying error.

注意：未定义的变量： \\ wamp \www\calendar\calendar.php on line 42

Notice: Undefined variable: calendar in C:\wamp\www\calendar\calendar.php on line 42

致命错误：调用C中非对象的成员函数make_calendar（） \wamp\www\calendar\calendar.php第42行

Fatal error: Call to a member function make_calendar() on a non-object in C:\wamp\www\calendar\calendar.php on line 42

。

推荐答案

您的函数 make_calendar c $ c>被定义？根据您的代码，它应该在booking_diary类

where your function make_calendar() is defined? According to your code, it should be in booking_diary class

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