存储变量session php - store variable session php

store variable session php

本文关键字：php session 变量存储 | 更新日期: 2023-09-27

嗨，我很难理解会话是如何工作的。我正在尝试编写一个程序，该程序将反复请求输入一个号码，每次输入号码时，程序都会打印出来：

那个数字
输入的所有数字的总和
我提交的次数

这是我迄今为止的代码：

<?php
session_start();
if(isset($_session['count']))
{
    $_session['count'] = $count;
}else{
    $_session['count'] = 0; 
}
?>
<html>
    <head>
        <title>number</Title>
            <style>
            </style>
        <body>
            <form action = "numbers.php" method = "post">
                Numbers: <input type "text" name = "number" size = "6"/>
                <input type = "submit" value = "submit" name = "submit"/>
                <p>
            </form>
        </body> 
    </head>
</Html>
<?php   
    if(isset($_POST["submit"]))
    {
        $number = $_POST['number'];
        If (is_numeric($number))
        {   
            $count = $_session['count'] + $number;
            print "Last number entered: ".$number;
            print "<br>Total internal numbers: ".$count;
        }
    }   
?>

我试图存储我的$count变量，所以每次我提交它时，它都会输出输入的数字的总和

在拥有名为$count的变量之前设置$_session['count'] = $count;。设置$count后，您必须更新会话值，如：

$count = $_session['count'] + $number;
$_session['count'] = $count;

然后，您可以将脚本的顶部替换为：

if(!isset($_session['count']))
{
    $_session['count'] = 0; 
}

一开始您使用的是未定义的变量$count。编辑为：

if(!isset($_session['count']))
    $_session['count'] = 0;

然后添加一行：

If (is_numeric($number))
{   
    $count = $_SESSION['count'] + $number;
    $_SESSION['count'] = $count;
    print "Last number entered: ".$number;
    print "<br>Total internal numbers: ".$count;
}

或第二部分编辑为：

If (is_numeric($number))
{   
    $_SESSION['count'] += $number;
    print "Last number entered: ".$number;
    print "<br>Total internal numbers: ".$_SESSION['count'];
}

<?php   
    if(isset($_POST["submit"]))
    {
        $number = $_POST['number'];
        If (is_numeric($number))
        {   
            $count = $_session['count'] + $number;
            $_session['count'] = $count;
            print "Last number entered: ".$number;
            print "<br>Total internal numbers: ".$count;
        }
    }   
?>

下面是一个工作示例[测试]

您必须分配$_SESSION['count']=$count;

<?php
session_start();
//Code commented as not required.
/*if(isset($_session['count']))
{
    $_session['count'] = $count;
}else{
    $_session['count'] = 0;
}
*/?>
<html>
<head>
    <title>number</Title>
    <style>
    </style>
    <body>
    <form action = "" method = "post">
        Numbers: <input type "text" name = "number" size = "6"/>
        <input type = "submit" value = "submit" name = "submit"/>
        <p>
    </form>
    </body>
</head>
</Html>
<?php
if(isset($_POST["submit"]))
{
    $number = $_POST['number'];
    if (is_numeric($number))
    {
        $count = $_SESSION['count'] + $number;
        $_SESSION['count']=$count;
        print "Last number entered: ".$number;
        print "<br>Total internal numbers: ".$count;
    }
}
?>