Question

我已经面对这个问题两天，我已经从多个帖子中学习。这些来自How to fix "Headers already sent" error in PHP和"Warning: Cannot modify header information - headers already sent by" error，但我仍然无法解决问题。

我的代码如下：

<?php
    ob_start();
    session_start();
    require_once('../dbconnection.php');
    session_name(getSessionName());

    if ((!empty($_SESSION["login"]))){
        header ("Location: summary.php");
    }
    session_regenerate_id(true);
    $module = 'acc';
?>
<!DOCTYPE html>
<html>
    <head>
        <?php 
            $root = realpath($_SERVER["DOCUMENT_ROOT"]);
            include('../templates/_common.php');
        ?>
        <title>ACC - Login</title>
    </head>

    <style>
        #theForm label.error {
            position:relative;
            color:red;
            font-family:arial;
            font-weight:bold;
            font-size:15px;
        }
    </style>

    <body>
        <?php           
            include('../templates/_loginheader.php');
        ?>
        <div class="container">
            <!--Body-->
            <div class="row">
                <div class="col-md-6 col-md-offset-3">
                    <div class="col-md-12">
                    <div class="logo-div"><img src="../images/logo.jpg"></div>
                        <br/>
                    <!-- Login -->
                    <?php
                        include_once "password.php";
                        $uname = "";
                        $pword = "";

                        if ($_POST) {
                            $uname = $_POST["username"];
                            $pword = $_POST["password"];

                            $uname = htmlspecialchars($uname);
                            $pword = htmlspecialchars($pword);

                            $link = connectDB();
                            $db_found = mysql_select_db(getDBName(), $link);

                            if ($db_found) {
                                $sql = sprintf("SELECT * FROM user u, employee e WHERE u.userId = e.userId AND username = '%s' AND u.status !='DELETE'",mysql_real_escape_string($uname));
                                $result = mysql_query($sql);
                                $num_rows = mysql_num_rows($result);
                                $row = mysql_fetch_array($result);

                                if ($result) {
                                    if ($num_rows > 0 && password_verify($pword,$row['password'])) {
                                        $_SESSION["login"] = "1";
                                        $_SESSION["name"] = $_POST["username"];
                                        $_SESSION["userid"] = $row["userId"];
                                        $_SESSION["first"] = $row["firstName"];
                                        $_SESSION["fullname"] = $row["firstName"]." ".$row["lastName"];
                                        $_SESSION["emp"] = $row["firstName"];
                                        $_SESSION["empid"] = $row["employeeId"];
                                        $_SESSION["branchId"] = $row["locationId"];
                                        $_SESSION["role"] = $row["role"];

                                        if ($row["super"] == 1)
                                            $_SESSION["super"] = 1;
                                        if ($row["isAdmin"] == 1)
                                            $_SESSION["sup"] = 1;

                                        //clock attendance if logged in
                                        clockAttendance();

                                        header ("Location: summary.php");
                                    }
                                    else
                                        echo("<div align=center class=\"alert alert-danger\"><b>Incorrect username or password</b></div>");
                                }   
                                mysql_close($link);
                            }
                            else 
                                echo("<div align=center class=\"alert alert-danger\">Database error</div>");
                        }
                    ?>

                    <form class="form-horizontal" role="form" id="theForm" action="index.php" method=post>
                        <div class="form-group">
                            <label for="username" class="col-sm-2 control-label">Username</label>
                            <div class="col-sm-10">
                                <input type="text" class="form-control" id="username" name="username" placeholder="Username">
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="password" class="col-sm-2 control-label">Password</label>
                            <div class="col-sm-10">
                                <input type="password" class="form-control" id="password" name="password" placeholder="Password">
                            </div>
                        </div>
                        <div class="form-group">
                            <div class="col-sm-offset-2 col-sm-10">
                                <button type="submit" class="btn btn-primary">Sign in</button>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>

        <script src="../js/jquery-1.10.2.js"></script>
        <script src="../js/jquery.validate.min.js"></script>
        <script src="../js/bootstrap.min.js"></script>
        <script>
            $(document).ready(function() {
                $("#theForm").validate({
                    rules: {
                        username: {
                            required: true,
                        },
                        password: {
                            required: true,
                        }       
                    },
                    messages: {
                        username: {
                            required: "Please enter a username",
                        },
                        password: {
                            required: "Please provide a password",
                        },
                    }
                });
            });
        </script>
    </body>
</html>

所以每当我从页面登录时，这些都是显示的错误。

任何人都可以建议并教我如何实现它吗？提前致谢。注意：我对PHP很新，所以如果有什么不对的地方，请随时指导正确的路径。谢谢。

登录时显示会话错误

0 个答案: