Home  >  Article  >  Backend Development  >  PHP Basics Eight Session Management and Control

PHP Basics Eight Session Management and Control

不言
不言Original
2018-04-23 09:57:431289browse

The content of this article is about the basic session management and control of PHP. It has a certain reference value. Now I share it with you. Friends in need can refer to it

<!-- 第十四章 php会话管理和控制 -->
<?php
    setcookie(&#39;name&#39;);
    setcookie(&#39;mycookie&#39;);
    setcookie(&#39;mycookie&#39;,&#39;&#39;);
    setcookie("mycookie",false);
    setcookie(&#39;mycookie&#39;,&#39;&#39;,time()-3600);
    echo ($HTTP_COOKIE_VARS[&#39;mycookie&#39;]);
    print_r($_COOKIE);
?>


<?php
if (($_POST[&#39;username&#39;] != null) && ($_POST[&#39;password&#39;] != null)) {
    $userName = $_POST[&#39;username&#39;];
    $passWord =md5($_POST[&#39;password&#39;]);
    $conn = mysqli_connect(&#39;localhost&#39;, &#39;root&#39;, &#39;root&#39;);
    mysqli_select_db($conn, &#39;test&#39;);
    $sql = "select * from user where &#39;username = &#39;$userName&#39;";
    $res = mysqli_query($conn, $sql);
    $row = mysqli_fetch_assoc($res);
    if ($row[&#39;password&#39;] == $passWord) {
        setcookie(&#39;username&#39;,$userName,time()+60*60*24*30);
        setcookie(&#39;password&#39;,$passWord,time()+60*60*24*30);
        header(&#39;Location: welcome.php&#39;."?username=$userName");
    }
}
if (($_COOKIE[&#39;username&#39;] != null) && ($_COOKIE[&#39;password&#39;] != null)) {
    $userName = $_COOKIE[&#39;username&#39;];
    $passWord = $_COOKIE[&#39;password&#39;];
    $conn = mysqli_connect(&#39;localhost&#39;, &#39;root&#39;, &#39;root&#39;, &#39;test&#39;);
    $res = mysqli_query($conn, "select * from user where username = &#39;$userName&#39;");
    $row = mysqli_fetch_assoc($res);
    if ($row[&#39;password&#39;] == $passWord) {
        header(&#39;location:welcome.php&#39;."?username=$userName");
    }
}
?>
<html>
 <head>
 
 </head>
 <body>
    <form action="" method="post">
        <p>
                      用户名:<input type="text" name="username" />
                      密码:<input type="text" name="password" />
            <input type="submit" value="登录"/>
        </p>
    </form>
 </body>
</html>

<?php
    /*
     * session使用:
     * 1.开启session
     * 2.添加session
     * 3.读取session数据
     * 4.销毁session数据
     * 5.session的扩展:默认session存储位置
     */
    session_start();
    $_SESSION=array(&#39;name&#39; => &#39;小明&#39;);
    $_SESSION = array();//销毁
    echo $_SESSION[&#39;name&#39;];
//     $_SESSION[&#39;name&#39;]=&#39;小明&#39;;
//     $_SESSION[&#39;name&#39;]=&#39;小明1&#39;;
//     echo  $_SESSION[&#39;name&#39;];
//     unset($_SESSION[&#39;name&#39;]);销毁且不可逆
//     echo $_SESSION[&#39;name&#39;];
?>


<?php
    session_start();
    if (($_POST[&#39;username&#39;] != null) && ($_POST[&#39;password&#39;] != null)) {
        $userName = $_POST[&#39;username&#39;];
        $passWord = $_POST[&#39;password&#39;];
        
        $conn = mysqli_connect(&#39;localhost&#39;, &#39;root&#39;, &#39;root&#39;, &#39;test&#39;);
        $res = mysqli_query($conn, "select * from user where username=&#39;$userName&#39;");
        $row = mysqli_fetch_assoc($res);
        if ($row[&#39;password&#39;] == $passWord) {
            $_SESSION[&#39;username&#39;] = $userName;
            $_SESSION[&#39;password&#39;] = $passWord;
            header(&#39;Location:welcome.php&#39;);
        }
    }
?>

<?php
    session_start();
    $userName = $_SESSION[&#39;username&#39;];
?>

<?php
    $goods = array();
    $i = 0;
    $conn = mysqli_connect(&#39;localhost&#39;, &#39;root&#39;, &#39;root&#39;, &#39;test&#39;);
    $res = mysqli_query($conn, &#39;select * from shop&#39;);
    while ($row = mysqli_fetch_assoc($res)){
        $goods[$i][&#39;id&#39;] = $row[&#39;id&#39;];
        $goods[$i][&#39;name&#39;] = $row[&#39;name&#39;];
        $goods[$i][&#39;price&#39;] = $row[&#39;price&#39;];
        $i++;
    }
?>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
    </head>
    <body>
        <?php
            foreach ($goods as $value){
                echo &#39;商品名&#39;.$value[&#39;name&#39;].&#39;价格&#39;.$value[&#39;price&#39;];
                echo "<a href=buy.php?name=".$value[&#39;name&#39;].&#39;&price=&#39;.
                $value[&#39;price&#39;].">购买</a>";
                echo &#39;<br />&#39;;
            }
        ?>
        <a href="shoppingCart.php">查看购物车</a>
    </body>
</html>


<html>
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
    <?php
        session_start();
        $name = $_GET[&#39;name&#39;];
        $price = $_GET[&#39;price&#39;];
        
        $goods = $_SESSION[&#39;goods&#39;];
        if ($name == $goods[$name][&#39;name&#39;]) {
            $_SESSION[&#39;totalPrice&#39;] += $price;
            $goods[$name][&#39;number&#39;] += 1;
        }else {
            $goods[$name][&#39;name&#39;] = $name;
            $goods[$name][&#39;price&#39;] = $price;
            $goods[$name][&#39;number&#39;] += 1;
            $_SESSION[&#39;totalPrice&#39;] += $price;
        }
        $_SESSION[&#39;goods&#39;] = $goods;
        header(&#39;location: goodsList.php&#39;);
    ?>
</body>
</html>

<html>
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<?php
    session_start();
    $goods = $_SESSION[&#39;goods&#39;];
    echo &#39;您购买了:<br />&#39;;
    foreach ($goods as $value){
        echo $value[&#39;name&#39;].&#39;价格&#39;.$value[&#39;price&#39;].&#39;数量&#39;.$value[&#39;number&#39;].&#39;<br />&#39;;
    }
    echo &#39;总数:&#39;.$_SESSION[&#39;totalPrice&#39;].&#39;<br />&#39;;
?>
<a href="goodsList.php">返回商品列表</a>
</body>
</html>

Related recommendations:

php basic seven php operation database

php basic six error handling

php basic five image processing


The above is the detailed content of PHP Basics Eight Session Management and Control. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn