php会话管理和控制

jacklove 原创: 2023-03-27 12:02:02 1365浏览
本篇将介绍php会话管理和控制的相关内容。
php会话管理和控制
<?php 
    setcookie('name'); 
    setcookie('mycookie'); 
    setcookie('mycookie',''); 
    setcookie("mycookie",false); 
    setcookie('mycookie','',time()-3600); 
    echo ($HTTP_COOKIE_VARS['mycookie']); 
    print_r($_COOKIE); 
?>   
<?php 
if (($_POST['username'] != null) && ($_POST['password'] != null)) { 
    $userName = $_POST['username']; 
    $passWord =md5($_POST['password']); 
    $conn = mysqli_connect('localhost', 'root', 'root'); 
    mysqli_select_db($conn, 'test'); 
    $sql = "select * from user where 'username = '$userName'"; 
    $res = mysqli_query($conn, $sql); 
    $row = mysqli_fetch_assoc($res); 
    if ($row['password'] == $passWord) { 
        setcookie('username',$userName,time()+60*60*24*30); 
        setcookie('password',$passWord,time()+60*60*24*30); 
        header('Location: welcome.php'."?username=$userName"); 
    } 
} 
if (($_COOKIE['username'] != null) && ($_COOKIE['password'] != null)) { 
    $userName = $_COOKIE['username']; 
    $passWord = $_COOKIE['password']; 
    $conn = mysqli_connect('localhost', 'root', 'root', 'test'); 
    $res = mysqli_query($conn, "select * from user where username = '$userName'"); 
    $row = mysqli_fetch_assoc($res); 
    if ($row['password'] == $passWord) { 
        header('location:welcome.php'."?username=$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('name' => '小明'); 
    $_SESSION = array();//销毁 
    echo $_SESSION['name']; 
//     $_SESSION['name']='小明'; 
//     $_SESSION['name']='小明1'; 
//     echo  $_SESSION['name']; 
//     unset($_SESSION['name']);销毁且不可逆 
//     echo $_SESSION['name']; 
?> 
<?php 
    session_start(); 
    if (($_POST['username'] != null) && ($_POST['password'] != null)) { 
        $userName = $_POST['username']; 
        $passWord = $_POST['password']; 
           
        $conn = mysqli_connect('localhost', 'root', 'root', 'test'); 
        $res = mysqli_query($conn, "select * from user where username='$userName'"); 
        $row = mysqli_fetch_assoc($res); 
        if ($row['password'] == $passWord) { 
            $_SESSION['username'] = $userName; 
            $_SESSION['password'] = $passWord; 
            header('Location:welcome.php'); 
        } 
    } 
?>  
<?php 
    session_start(); 
    $userName = $_SESSION['username']; 
?>  
<?php 
    $goods = array(); 
    $i = 0; 
    $conn = mysqli_connect('localhost', 'root', 'root', 'test'); 
    $res = mysqli_query($conn, 'select * from shop'); 
    while ($row = mysqli_fetch_assoc($res)){ 
        $goods[$i]['id'] = $row['id']; 
        $goods[$i]['name'] = $row['name']; 
        $goods[$i]['price'] = $row['price']; 
        $i++; 
    } 
?> 
<html> 
    <head> 
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> 
    </head> 
    <body> 
        <?php 
            foreach ($goods as $value){ 
                echo '商品名'.$value['name'].'价格'.$value['price']; 
                echo "<a href=buy.php?name=".$value['name'].'&price='. 
                $value['price'].">购买</a>"; 
                echo '<br />'; 
            } 
        ?> 
        <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['name']; 
        $price = $_GET['price']; 
           
        $goods = $_SESSION['goods']; 
        if ($name == $goods[$name]['name']) { 
            $_SESSION['totalPrice'] += $price; 
            $goods[$name]['number'] += 1; 
        }else { 
            $goods[$name]['name'] = $name; 
            $goods[$name]['price'] = $price; 
            $goods[$name]['number'] += 1; 
            $_SESSION['totalPrice'] += $price; 
        } 
        $_SESSION['goods'] = $goods; 
        header('location: goodsList.php'); 
    ?> 
</body> 
</html>  
<html> 
<head> 
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> 
</head> 
<body> 
<?php 
    session_start(); 
    $goods = $_SESSION['goods']; 
    echo '您购买了：<br />'; 
    foreach ($goods as $value){ 
        echo $value['name'].'价格'.$value['price'].'数量'.$value['number'].'<br />'; 
    } 
    echo '总数：'.$_SESSION['totalPrice'].'<br />'; 
?> 
<a href="goodsList.php">返回商品列表</a> 
</body> 
</html>
本篇介绍了php会话管理和控制，更多相关知识内容请关注php中文网。
php会话管理和控制

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