Simple PHP login:
Create a database (mysqladmin)
Name the table "dbUsers." It will need 4 fields:
Name Type Addition
id int(10) Primary Key, AUTO_INCREMENT
username varchar(16) Unique
password char(16)
email varchar(25)
Create a new file and name it dbConfig.php This will file will connect to the database
<?
// Replace the variable values below
// with your specific database information.
$host = "localhost";
$user = "UserName";
$pass = "Password";
$db = "dbName";
// This part sets up the connection to the
// database (so you don't need to reopen the connection
// again on the same page).
$ms = mysql_pconnect($host, $user, $pass);
if ( !$ms )
{
echo "Error connecting to database.\n";
}
// Then you need to make sure the database you want
// is selected.
mysql_select_db($db);
?>
Registration name this file "register.php"
<?php
// dbConfig.php is a file that contains your
// database connection information. This
// tutorial assumes a connection is made from
// this existing file.
include ("dbConfig.php");
//Input vaildation and the dbase code
if ( $_GET["op"] == "reg" )
{
$bInputFlag = false;
foreach ( $_POST as $field )
{
if ($field == "")
{
$bInputFlag = false;
}
else
{
$bInputFlag = true;
}
}
// If we had problems with the input, exit with error
if ($bInputFlag == false)
{
die( "Problem with your registration info. "
."Please go back and try again.");
}
// Fields are clear, add user to database
// Setup query
$q = "INSERT INTO `dbUsers` (`username`,`password`,`email`) "
."VALUES ('".$_POST["username"]."', "
."PASSWORD('".$_POST["password"]."'), "
."'".$_POST["email"]."')";
// Run query
$r = mysql_query($q);
// Make sure query inserted user successfully
if ( !mysql_insert_id() )
{
die("Error: User not added to database.");
}
else
{
// Redirect to thank you page.
Header("Location: register.php?op=thanks");
}
} // end if
//The thank you page
elseif ( $_GET["op"] == "thanks" )
{
echo "<h2>Thanks for registering!</h2>";
}
//The web form for input ability
else
{
echo "<form action=\"?op=reg\" method=\"POST\">\n";
echo "Username: <input name=\"username\" MAXLENGTH=\"16\">\n";
echo "Password: <input type=\"password\" name=\"password\" MAXLENGTH=\"16\">\n";
echo "Email Address: <input name=\"email\" MAXLENGTH=\"25\">\n";
echo "<input type=\"submit\">\n";
echo "</form>\n";
}
// EOF
?>
Login name this file "login.php"
<?php
session_start();
// dBase file
include "dbConfig.php";
if ($_GET["op"] == "login")
{
if (!$_POST["username"] || !$_POST["password"])
{
die("You need to provide a username and password.");
}
// Create query
$q = "SELECT * FROM `dbUsers` "
."WHERE `username`='".$_POST["username"]."' "
."AND `password`=PASSWORD('".$_POST["password"]."') "
."LIMIT 1";
// Run query
$r = mysql_query($q);
if ( $obj = @mysql_fetch_object($r) )
{
// Login good, create session variables
$_SESSION["valid_id"] = $obj->id;
$_SESSION["valid_user"] = $_POST["username"];
$_SESSION["valid_time"] = time();
// Redirect to member page
Header("Location: members.php");
}
else
{
// Login not successful
die("Sorry, could not log you in. Wrong login information.");
}
}
else
{
//If all went right the Web form appears and users can log in
echo "<form action=\"?op=login\" method=\"POST\">";
echo "Username: <input name=\"username\" size=\"15\">";
echo "Password: <input type=\"password\" name=\"password\" size=\"8\">";
echo "<input type=\"submit\" value=\"Login\">";
echo "</form>";
}
?>
Members Area name this file "members.php", and include on pages that are only for registered users
?php
session_start();
if (!$_SESSION["valid_user"])
{
// User not logged in, redirect to login page
Header("Location: login.php");
}
// Member only content
// ...
// ...
// ...
// Display Member information
echo "<p>User ID: " . $_SESSION["valid_id"];
echo "<p>Username: " . $_SESSION["valid_user"];
echo "<p>Logged in: " . date("m/d/Y", $_SESSION["valid_time"]);
// Display logout link
echo "<p><a href=\"logout.php\">Click here to logout!</a></p>";
?>
logout name this file "logout.php"
<?php
session_start();
session_unset();
session_destroy();
// Logged out, return home.
Header("Location: index.php");
?>
There you go... need more help or confused, just ask.
If this information solved your problem. Please add to my reputation.
Thanks
macneato
