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how to get username and display when is logged in

 原文  2016-09-06 05:14:07  6   4    php/ html/ css

Question

in this i wannna get the username who is logged in and display it in the home page when the username is correct and registered in database .should i use session and where to use it.how it is been done 

 <?php error_log("chk.php executing"); // Get values from form include 'config.php'; foreach ($_POST as $key => $value) { error_log($key); } //error_log($_POST['username']); $username=$_POST['username']; $password=$_POST['password']; // Insert data into mysql $qry = mysql_query("SELECT * FROM useraccount WHERE username='$username'"); if(!$qry) { die("Query Failed: ". mysql_error()); } else { $row=mysql_fetch_array($qry); if ($username==$row['username']) { if($username=='' || $password=='') { error_log("some fields are empty"); //header("Location:login.php?id=Some fields are empty"); // header("Content-Type: text/html"); // {echo "<b>Some fields are empty</b>";} } else if($username==$row['username'] && $password==$row['password']) { error_log("logged in"); header('Location: home.html'); // header("Content-Type: text/html"); // {echo "<b>User name password verified</b>";} //header("Location: home.html?id=$username"); } else { error_log("password is incorrect"); // header("Content-Type: text/html"); // {echo "<b>username already taken or your password is incorrect. Please try again</b>";} //header("Location:.php?id=username already taken or your password is incorrect. Please try again"); }} else error_log("username incorrect"); } mysql_close(); ?> 
 html,body { margin:0px; height:100%; } .carousel-inner > .item > img, .carousel-inner > .item > a > img { width: 60%; margin: auto; } .content { width:100%; height:400px; } .signup { height:500px; } .footer { position:relative; background-color:black; } 
  <!DOCTYPE html> <html lang="en"> <head> <title>ASK</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" type="text/css" href="boot.css"> <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script> <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <div class="jumbotron"> <div class="container"> <div class="row"> <div class="col-md-6"> <h1>school name</h1> </div> <div class="col-md-6"> <img src="../project/photo/l.png" height="150px"/> </div> </div> </div> </div> <nav class="navbar navbar-inverse navbar-fixed-top"> <div class="container-fluid"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#mynavbar">schoolName</a> </div> <div class="collapse navbar-collapse" id="myNavbar"> <ul class="nav navbar-nav"> <li class="active"><a href="#">Home</a></li> <li><a href="about.html" target=_self>About Us</a></li> <li><a href="infra.html" target=_self>Infrastructure</a></li> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" href="">Administration<span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="stlogin.html">staff login</a></li> <li><a href="stdetails.html">staff details</a></li> <li><a href="class.html">class handling</a></li> </ul> </li> </ul> <ul class="nav navbar-nav navbar-right"> <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li> <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li> </ul> </div> </div> </nav> <div class="container"> <form class="form-horizontal" action="chk.php" method="POST"> <div class="form-group"> <div class="col-xs-3"> <label for="username">Username:</label> <input name="username" type="username" class="form-control" id="username" placeholder="Enter username"> </div></div> <div class="form-group"> <div class="col-xs-3"> <label for="pwd">Password:</label> <input name="password" type="password" class="form-control" id="password" placeholder="Enter password"> </div></div> <!-- <div class="checkbox"> <label><input type="checkbox"> Remember me</label><br> </div> --> <button type="submit" class="btn btn-default">Submit</button><br> </form> </div> <div class="footer navbar-fixed-bottom"> <p> Copyrights@ &copy;WWW.schools.com</p> </div> </body> </html>

4 answers

solution1
 1  2016-09-06 05:24:20

You can use SESSION . You have to use session_start() in every files that you want to display the username 

    else if($username==$row['username'] && $password==$row['password']) {
                $_SESSION['username'] = $username; // store username name in session
                error_log("logged in");
                header('Location: home.html');
                // header("Content-Type: text/html");
                // {echo "<b>User name password verified</b>";}
                header("Location: home.php?id=$username"); // redirect to home.php page

You can simply display the username by echo $_SESSION['username']; Don't forget to add session_start(); in your home.php. For more info please refer to this link http://php.net/manual/en/function.session-start.php

solution2
 1  2016-09-06 05:25:50

first of all when username store in session on login time 


  <?php

session_start();

 - List item

error_log("chk.php executing"); // Get values from form  include 'config.php';

foreach ($_POST as $key => $value) {    error_log($key); } //error_log($_POST['username']); $username=$_POST['username']; $password=$_POST['password']; // Insert data into mysql  $qry   = mysql_query("SELECT * FROM useraccount WHERE username='$username'"); if(!$qry) { die("Query Failed: ". mysql_error()); } else {

$row=mysql_fetch_array($qry);

if ($username==$row['username']) {
    if($username=='' || $password=='') {
        error_log("some fields are empty");
        //header("Location:login.php?id=Some fields are empty");
        // header("Content-Type: text/html");           // {echo "<b>Some fields are empty</b>";}
    } else if($username==$row['username'] && $password==$row['password']) {
        error_log("logged in");

       $_SESSION['username']=$row['username'];
        header('Location: home.html');
        // header("Content-Type: text/html");           // {echo "<b>User name password verified</b>";}
        //header("Location: home.html?id=$username");
    } else {
        error_log("password is incorrect");
        // header("Content-Type: text/html");           // {echo "<b>username already taken or your password is incorrect. Please try again</b>";}
        //header("Location:.php?id=username already taken or your password is incorrect. Please try again");
    }}
    else
        error_log("username incorrect"); } mysql_close(); ?>

Another page we get this username and we change file name home.html to home.php

home.php

echo $_SESSION['username'];

?> output username print this page

solution3
 0  2016-09-06 05:40:26

You should use session_start(); After successfully login,you can post username or email like this- 

<?php
include_once'dbconnect.php';
$res=mysql_query("SELECT * FROM users WHERE user_id=".$_SESSION['user']);
$userRow=mysql_fetch_array($res);
//print logged in user's email as saved in database
echo $userRow['email'];
////print logged in user's username as saved in database
echo $userRow['username'];
?>

This is as per my database where-

  • 'dbconnect.php'is connection file.

  • 'users' is tablename.

solution4
 0  2016-09-06 07:30:10

You can use session_start(); and store the username into it. 

//Initialize the session:
session_start();
<!doctype html>
<head>
.
.
.
</head>
<body>
.
.
<?php
$q = "SELECT * FROM useraccount WHERE username='$username'";
$r = $mysqli->query($q);
if ($r->num_rows == 1) {
$_SESSION = $r-> fetch_array(MYSQLI_ASSOC); 
}
?>
.
</body>
</html>

You can take a look at my site for that same query at hiteachers.com

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