Question

有两个php文件：welcome.php和check.php。
welcome.php如下。

<?php
session_start();
if($_COOKIE["user"]["xm"] <> "")
{
    $visnum = intval($_COOKIE["user"]["num"])+1;
    setcookie("user[num]" , $visnum , time()+3600);
    setcookie("user[dt]" , date("Y-m-d h:i:s") ,time()+3600);
    echo "welcome  " . $_COOKIE["user"]["xm"];
    echo  "<br />This is your " . $visnum . "  th" . "  visit my website";
    echo  "<br />The latest visit time is  " .$_COOKIE["user"]["dt"] ;

}
else
{
    echo
        '<html><body><form method="post"  action="check.php">
           user: &nbsp;&nbsp;<input type="text" name="xm" size="12"><br />                        
           password:&nbsp;&nbsp;<input type="password" name="Pwd" size="12"><br />
          <input type="submit" value="login"><br />
        </form></body></html>';
}
?>

check.php如下。

<?php
session_start();
if($_POST["xm"] == "admin" && $_POST["Pwd"] == "123")
{
    setcookie("user[xm]" , $_POST["xm"] , time()+3600);
    setcookie("user[dt]" , date("Y-m-d h:i:s") , time()+3600);
    echo  $_POST["xm"] . "  :Your first visit  ";
}
else
{
    echo  "<script>alert('user name or password is wrong');location.href = 'welcome.php';</script>";
}
?>

何时在用户中输入admin :Your first visit并在welcome.php中的admin中输入123时，check.php将显示password。

  admin :Your first visit

这是您第一次点击127.0.0.1/welcome.php

然后第二次在浏览器中单击127.0.0.1/welcome.php，输出如下：

welcome admin
This is your 2 th visit my website
The latest visit time is

注意：时间戳不在上面的输出中。
要第三次单击浏览器中的127.0.0.1/welcome.php，输出如下：

welcome admin
This is your 3 th visit my website
The latest visit time is 2018-08-11 12:09:36

如何第二次显示在浏览器中打开127.0.0.1/welcome.php的访问时间？

Answer 1

session_start();

if(!isset($_SESSION["visit"])) {
    $_SESSION["visit"] = date("Y-m-d h:i:s");
}else{
    echo "Your first visit was {$_SESSION["visit"]}";
}

尝试使用Sessions

isset将检查其是否具有值，如果没有，则将设置时间。但是，如果已设置，它将显示时间。

Answer 2

方法1：使用Cookie。
如下重写welcome.php。

<?php
session_start();
if($_COOKIE["user"]["xm"] <> "")
{
    $visnum = intval($_COOKIE["user"]["num"])+1;
    setcookie("user[num]" , $visnum , time()+3600);
    echo "welcome  " . $_COOKIE["user"]["xm"];
    echo  "<br />This is your " . $visnum . "  th" . "  visit my website";
    echo  "<br />The latest visit time is  " .$_COOKIE["user"]["dt"] ;
    setcookie("user[dt]" , date("Y-m-d h:i:s") ,time()+3600);
}
else
{
    echo
        '<html><body><form method="post"  action="check.php">
           user: &nbsp;&nbsp;<input type="text" name="xm" size="12"><br />                        
           password:&nbsp;&nbsp;<input type="password" name="Pwd" size="12"><br />
          <input type="submit" value="login"><br />
        </form></body></html>';
}
?>

方法2：使用会话。
感谢K Sudbury's的提醒。
如下重写welcome.php。

<?php
session_start();
if($_COOKIE["user"]["xm"] <> "")
{
    $visnum = intval($_COOKIE["user"]["num"])+1;
    $expire = intval($_COOKIE["user"]["expire"]);
    setcookie("user[num]" , $visnum , time()+3600*$expire);
    echo "welcome  " . $_COOKIE["user"]["xm"];
    echo  "<br />This is your " . $visnum . "  th" . "  visit my website";
    echo  "<br />The latest visit time is  " .$_SESSION["visit"] ;
    $_SESSION["visit"] = date("Y-m-d h:i:s");
}
else
{
    echo
        '<html><body><form method="post"  action="check.php">
           user: &nbsp;&nbsp;<input type="text" name="xm" size="12"><br />                        
           password:&nbsp;&nbsp;<input type="password" name="Pwd" size="12"><br />
          <input type="submit" value="login"><br />
        </form></body></html>';
}
?>

如下所示重写check.php。

<?php
session_start();
if($_POST["xm"] == "admin" && $_POST["Pwd"] == "123")
{
    setcookie("user[xm]" , $_POST["xm"] , time()+3600);
    setcookie("user[expire]" ,1 , time()+3600);
    setcookie("user[dt]" , date("Y-m-d h:i:s") , time()+3600*$expire);
    $_SESSION["visit"] = date("Y-m-d h:i:s");
    echo  $_POST["xm"] . "  :Your first visit  ";
}
else
{
    echo  "<script>alert('user name or password is wrong');location.href = 'welcome.php';</script>";
}
?>

如何显示第二次打开“ welcome.php”的访问时间？

2 个答案: