php-保存在会话中，一系列具有私有属性的对象，然后收集它们

Question

我有一个月的班级对象。我继续进行会议，因此我不必不断检索信息。

看起来像这样的月份类：

<?php

class Month{

    private static $mes;
    private static $year;

    static function void(){
        return new self(null, null);
    }

    function __construct($mes, $year){
        $this->mes = $mes;
        $this->year = $year;
    }

    // GETTERS 
    public function getMes(){
        return $this->mes;
    }

    public function getYear(){
        return $this->year;
    }

    //SETTERS

    public function setMes($mes){
        $this->mes = $mes;
    }

   public function setYear($year){
        $this->year = $year;
    }

    //Métodos
    public function toString(){
        switch ($this->mes) {
            case 1:
                return "Enero - ".$this->year;
                break;
            case 2:
                return "Febrero - ".$this->year;
                break;
            case 3:
                return "Marzo - ".$this->year;
                break;
            case 4:
                return "Abril - ".$this->year;
                break;
            case 5:
                return "Mayo - ".$this->year;
                break;
            case 6:
                return "Junio - ".$this->year;
                break;
            case 7:
                return "Julio - ".$this->year;
                break;
            case 8:
                return "Agosto - ".$this->year;
                break;
            case 9:
                return "Septiembre - ".$this->year;
                break;
            case 10:
                return "Octubre - ".$this->year;
                break;
            case 11:
                return "Noviembre - ".$this->year;
                break;
            case 12:
                return "Diciembre - ".$this->year;
                break;
        }
    }
}

然后在显示信息的文件中，我有以下代码：

require_once '../Model/ClassEmpleado.php';
require_once '../Model/ClassMonth.php';
include '../Control/CListado-Leads.php';

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

if(!isset($_SESSION['meses'])){
    $_SESSION['meses'] = getMonths();
    $meses = $_SESSION['meses'];
    var_dump($_SESSION['meses']);
}
else{
    $meses = $_SESSION['meses'];
    var_dump($_SESSION['meses']);
}

最后，在下面，我显示了一个选项，并在数组中为每个对象提供一个选项。

    <div class="mt-5 container-fluid">
        <form action='#' method='POST'>
            Mes: <select id='filtromes' name='filtromes' class="filtro-mes">
                <option class='opciones-filtro-mes' value='0'>Histórico Completo</option>
                
                <?php 
                    for($i = 0; $i < count($meses); $i++){
                        $mes = $meses[$i];
                        echo "<option class='opciones-filtro-mes' value='" . $mes->getMes() . "-" . $mes->getYear() . "'>".$meses[$i]->toString() . "</option>";
                    }
                ?>
            </select>
        </form>
    </div>

所有这些都可以正常工作，第一次访问文件时，我收集信息并将其存储在会话中。

问题稍后，重新加载页面或从其他页面再次访问它时，会话中的数组似乎已经更改并且不再起作用。

如果我将会话变量var_dump var_dump，我将获得此输出：

第一次：

array(15) { [0]=> object(Month)#4 (2) { ["mes"]=> string(1) "4" ["year"]=> string(4) "2021" } [1]=> object(Month)#5 (2) { ["mes"]=> string(1) "5" ["year"]=> string(4) "2021" } [2]=> object(Month)#6 (2) { ["mes"]=> string(1) "6" ["year"]=> string(4) "2021" } [3]=> object(Month)#7 (2) { ["mes"]=> string(1) "7" ["year"]=> string(4) "2021" } [4]=> object(Month)#8 (2) { ["mes"]=> string(1) "8" ["year"]=> string(4) "2021" } [5]=> object(Month)#9 (2) { ["mes"]=> string(1) "9" ["year"]=> string(4) "2021" } [6]=> object(Month)#10 (2) { ["mes"]=> string(2) "10" ["year"]=> string(4) "2021" } [7]=> object(Month)#11 (2) { ["mes"]=> string(2) "11" ["year"]=> string(4) "2021" } [8]=> object(Month)#12 (2) { ["mes"]=> string(2) "12" ["year"]=> string(4) "2021" } [9]=> object(Month)#13 (2) { ["mes"]=> string(1) "1" ["year"]=> string(4) "2022" } [10]=> object(Month)#14 (2) { ["mes"]=> string(1) "2" ["year"]=> string(4) "2022" } [11]=> object(Month)#15 (2) { ["mes"]=> string(1) "3" ["year"]=> string(4) "2022" } [12]=> object(Month)#16 (2) { ["mes"]=> string(1) "4" ["year"]=> string(4) "2022" } [13]=> object(Month)#17 (2) { ["mes"]=> string(1) "5" ["year"]=> string(4) "2022" } [14]=> object(Month)#18 (2) { ["mes"]=> string(1) "6" ["year"]=> string(4) "2022" } }

从另一页重新加载或访问时：

array(15) { [0]=> object(Month)#2 (2) { ["mes":"Month":private]=> string(1) "4" ["year":"Month":private]=> string(4) "2021" } [1]=> object(Month)#3 (2) { ["mes":"Month":private]=> string(1) "5" ["year":"Month":private]=> string(4) "2021" } [2]=> object(Month)#4 (2) { ["mes":"Month":private]=> string(1) "6" ["year":"Month":private]=> string(4) "2021" } [3]=> object(Month)#5 (2) { ["mes":"Month":private]=> string(1) "7" ["year":"Month":private]=> string(4) "2021" } [4]=> object(Month)#6 (2) { ["mes":"Month":private]=> string(1) "8" ["year":"Month":private]=> string(4) "2021" } [5]=> object(Month)#7 (2) { ["mes":"Month":private]=> string(1) "9" ["year":"Month":private]=> string(4) "2021" } [6]=> object(Month)#8 (2) { ["mes":"Month":private]=> string(2) "10" ["year":"Month":private]=> string(4) "2021" } [7]=> object(Month)#9 (2) { ["mes":"Month":private]=> string(2) "11" ["year":"Month":private]=> string(4) "2021" } [8]=> object(Month)#10 (2) { ["mes":"Month":private]=> string(2) "12" ["year":"Month":private]=> string(4) "2021" } [9]=> object(Month)#11 (2) { ["mes":"Month":private]=> string(1) "1" ["year":"Month":private]=> string(4) "2022" } [10]=> object(Month)#12 (2) { ["mes":"Month":private]=> string(1) "2" ["year":"Month":private]=> string(4) "2022" } [11]=> object(Month)#13 (2) { ["mes":"Month":private]=> string(1) "3" ["year":"Month":private]=> string(4) "2022" } [12]=> object(Month)#14 (2) { ["mes":"Month":private]=> string(1) "4" ["year":"Month":private]=> string(4) "2022" } [13]=> object(Month)#15 (2) { ["mes":"Month":private]=> string(1) "5" ["year":"Month":private]=> string(4) "2022" } [14]=> object(Month)#16 (2) { ["mes":"Month":private]=> string(1) "6" ["year":"Month":private]=> string(4) "2022" } }

您可以看到会话中的变量已更改。看起来该变量已被序列化或类似的东西。

如果我将班级的属性视为公开，则可以很好地工作。但是对于安全，我希望他们成为私人。

Answer 1

首先，

$messe = $_SESSION['meses']; 
// will create copy of $_SESSION['meses']
// changes to $messe wont be saved to $_SESSION['meses']

您应该使用 alias/coreences/coreences ，即，即：

$messe =& $_SESSION['meses'];
if (!isset($messe)) {
    $messe = getMonths(); 
}
var_dump($_SESSION['meses']);