php - fatal error : Call to a member function make_calendar() on a non-object

Question

这个问题已经有答案了:

Error in calendar booking system (1 个回答)

已关闭 9 年前。

我是 PHP 新手，正在尝试构建一个日历预订系统。我正在得到

Fatal error: Call to a member function make_calendar() on a non-object in C:\wamp\www\calendar\calendar.php on line 46

和

Notice: Undefined variable: calendar in C:\wamp\www\calendar\calendar.php on line 46

访问我的网站 localhost/calendar/calendar.php 时出错

                                      // calendar.php
    <?
    include('php/connect.php'); 
    include('classes/class_calendar.php');
    $calendar = new booking_diary($link);
    // some more code
    ?>

//中间有一些 HTML 代码

<?php     

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

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

?>

class_calendar.php 中的“booking_diary”类看起来像

class booking_diary {

        function __construct($link) {
        $this->link = $link;    
        }
function make_calendar($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);

  }

// some more PHP code
}

哪里$link = mysqli_connect($host, $user, $password);在 connect.php

内

线上有错误

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

Answer 1

你会踢自己的!

这可能是您的问题之一:

当您在类代码中声明该方法时，年份参数前面没有 $ 符号。

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

尝试

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