Question

嗨，我在理解会话是如何工作方面遇到了麻烦。我正在尝试编写一个程序，它将重复请求输入一个数字，每次输入数字时，程序都要打印出来：

那个号码
输入的所有数字的总和
我提交的次数

到目前为止，这是我的代码：

<?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，所以每次提交时都会输出输入数字的总和

Answer 1

在设置名为$_session['count'] = $count;的变量之前设置$count。在设置$count之后，您必须更新会话值：

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

然后，您可以使用以下命令替换脚本顶部：

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

Answer 2

<?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;
        }
    }   
?>

Answer 3

一开始你使用未定义的变量$ count。将其编辑为：

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

然后添加一个新行：

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'];
}

Answer 4

这是工作示例。的 [TESTED]

您必须指定$_SESSION['count']=$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; } } ?>

存储变量会话php

4 个答案: