Dear kloplop321,
I really want to make a php, mysql based game. I have an idea about how I am going to do it. I would just really love some help with the SESSION login. There are tutorials on the internet but I find that they don’t show the full code or stuff like that. So if you would please create a tutorial on it I would apprecitate it. Thanks.

This tutorial naturally has the sources provided.

The following videos(2) go over the concept of a login system in PHP while using sessions(to maintain the login status) and MySQL(a database that holds the information). I first go over how to make

• the login page
• the table in the database
• a user through PHPMyAdmin _{[the next tutorial will likely go over registering users]}
• code how to validate that user and if they are validated
• if so, set the session information
• if acceptable, they can go to a “members only” page _{[which only allows identified people in]}
• a way to log out

Again: this tutorial is pretty much a walk-through in concept of a mysql login system.

Part 2 (the most important) and the sources after the jump.

And now the sources.
include.php


<?php
session_start();//start the session
//now to do the MySQL connection.
$link = mysql_connect('localhost', 'phpuser', 'phppass');
if (!$link) {
    die('Could not connect: ' . mysql_error());
}
//WE NEED to select the database!
mysql_select_db("tutorials_login");

index.php


<?php
include("include.php");
//see if the person is trying to log in now..
if(isset($_REQUEST['sub'])){
    $username = trim($_REQUEST['username']);
    $password = trim($_REQUEST['password']);
    //make it safe to see if in the table
    $username = mysql_real_escape_string($username);
    $password = md5($password);
    //time to query
    $sql = "SELECT * FROM `users` WHERE username = '$username' AND password = '$password'";
    $result = mysql_query($sql);
    $exists = false;
    $userid = -1;
    while($row = mysql_fetch_array($result)){
        $exists = true;
        $userid = (int)$row[0];
        break;//get out of the while loop
    }
    if($exists){
        $_SESSION['isin'] = 1;
        $_SESSION['userid'] = $userid;
    }else{
        echo "You got something wrong, try again<br />\n";
        //echo $sql;
    }
}//chopsuey


logout.php


<?php
session_start();
session_destroy();
header("location: index.php");
?>



membersonly.php


<?php
include("include.php");
if($_SESSION['isin'] == 1){
    echo "Hey there ";
    $sql = "SELECT * FROM users WHERE id = ".$_SESSION['userid'];
    $result = mysql_query($sql);
    $info = null;
    while($row = mysql_fetch_array($result)){
        $info = $row;
    }
    echo $info['username'];//hey there pickles
    echo " Would you like to <a href=\"index.php\">go back</a>? ";
    
}else{
    //you don't belong here, kick back to the index
    header("location: index.php");
}
?>

Also a tid bit of information: I did this in Linux, and I recorded it in 1080p HD!

This video has two parts, so to understand fully, please watch both.

Part 2 and the source after the jump

<?php
$link = mysql_connect('localhost', 'phpuser', 'phppass');
if (!$link) {
    die('Not connected : ' . mysql_error());
}else{
    //echo "I am connected. ";
}

// make foo the current db
$db_selected = mysql_select_db('guestbook', $link);
if (!$db_selected) {
    die ('Can\'t use guestbook DB : ' . mysql_error());
}
$name = trim($_REQUEST['name']);
$comment = trim($_REQUEST['comment']);
if(strlen($name)> 0){
    if(strlen($comment)> 0){
        $name = mysql_real_escape_string($name);
        $comment = mysql_real_escape_string($comment);

        $sql = "INSERT INTO `guestbook`.`entries` (
`ID` ,
`name` ,
`date` ,
`comment`
)
VALUES (
NULL , '$name', UNIX_TIMESTAMP( ) , '$comment'
);";
mysql_query($sql);
    }else{
        echo "You did not put in a comment.";
    }
}else{
    if(strlen($comment)> 0){
        echo "you got a comment, but not a name;";
    }
}
$sql = "SELECT *
FROM `entries` ORDER BY `ID` DESC
LIMIT 3";
$result = mysql_query($sql);
while($row = mysql_fetch_array($result)){
    echo $row['name']." Said: <blockquote>".$row['comment']."</blockquote><br />";
}
?>
<form action="?" method="post">
Name:
<input type="text" name="name" /><br />
Comment: <br />
<textarea name="comment"></textarea><br />
<input type="submit" value="Submit" />
</form>

• dBase
• DB++
• FrontBase
• filePro
• Firebird/InterBase
• Informix
• IBM DB2
• Ingres
• MaxDB
• Mongo
• mSQL
• Mssql
• MySQL
• Mysqli
• Mysqlnd
• OCI8
• Ovrimos SQL
• Paradox
• PostgreSQL
• SQLite
• SQLite3
• Sybase
• tokyo_ tyrant

Some of these methods use the same database type, such as MySQL and Mysqli. However I will only be focusing on the most common methods, which incude MySQL, SQLite, and OBCD.

Most PHP developers use MySQL due to its support, popularity, cross-platform, and universal capabilities. It is not proprietary like Microsoft Access Databases, and it has a really handy tool called PHPMyAdmin.

SQL looks like this

INSERT INTO My_table
(field1, field2, field3)
VALUES
(‘test’, ‘N’, NULL);

In PHP, we can wrap this in double quotes like so

$sql = "INSERT INTO My_table
 (field1, field2, field3)
 VALUES
 ('test', 'N', NULL);";

and then execute it with what ever database method we choose.

MySQL:
mysql_query($sql);
SQLite:
sqlite_query($db,$sql);
OBCD:
odbc_exec($db, $sql);

As I have only had personal experience with two of the above, I will not cover OBCD any more than the above.

Back to MySQL and SQLite:
Both MySQL and SQLite require an initiation at the beginning of each script execution. In MySQL’s case an example would be:

<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_close($link);
?>

<?php
$link = mysql_connect(‘localhost’, ‘USER’, ‘PASS’);
mysql_selectdb(“DB_NAME”);
$name = “TABLE_NAME”;
$sql = “SELECT *
FROM `$name` LIMIT 1″;
$res = mysql_query($sql);
$row = mysql_fetch_array($res);
$cols = mysql_num_fields($res);
$sql = “SELECT *
FROM `$name`”;
$res = mysql_query($sql);
$rowsdone = 0;
if ($db = sqlite_open(‘SQLITE_FILE_LOCATION’, 0666, $sqliteerror)) {
$res = mysql_query($sql);
while($row = mysql_fetch_array($res)){
$sqli = “INSERT INTO $name VALUES(“;
for($x = 0; $x < $cols; $x++){
$sqli .= “‘”.sqlite_escape_string($row[$x]).”‘”;
if($x != $cols -1){
$sqli .= ” , “;
}
}
$sqli .= “);”;
$result = sqlite_query($db,$sqli);
if(sqlite_last_error($db) != 1){
echo sqlite_error_string(sqlite_last_error($db)).”\n”;
//echo strip_tags($sqli);
echo “<br>\n “;
}
}
} else {
die ($sqliteerror);
}
?>

if ($db = sqlite_open(‘SQLITE_FILE_LOCATION’, 0666, $sqliteerror)) {

mysql_selectdb(“DB_NAME_HERE“);

CREATE TABLE `DB_NAME_HERE`.`tablename` (

`id` INT( 8 ) UNSIGNED NOT NULL AUTO_INCREMENT ,
`description` TEXT NOT NULL ,
PRIMARY KEY ( `id` ) ,
INDEX ( `id` )

) ENGINE = MYISAM ;

INSERT INTO `DB_NAME_HERE`.`tablename` (

`id` ,
`description`

)
VALUES (

NULL , ‘Beans do not taste like fruit.’

);

echo mysql_error();

echo sqlite_error_string(sqlite_last_error($db));

$sql = “SELECT  * FROM `TABLE_NAME`”;

$result = mysql_query($sql);

while($row = mysql_fetch_array($result)){

while($row = mysql_fetch_assoc($result)){

while($row = mysql_fetch_array($result)){

print_r($row);

}

UPDATE `DB_NAME`.`tablename` SET `description` = 'Beans do not taste like fruit. Yet they are supposed to be magical...' WHERE `tablename`.`id` =1;

<?php
$link = mysql_connect('localhost', 'phpuser', 'phppass');
if (!$link) {
    die('Not connected : ' . mysql_error());
}else{
    //echo "I am connected. ";
}

// make foo the current db
$db_selected = mysql_select_db('test', $link);
if (!$db_selected) {
    die ('Can\'t use test : ' . mysql_error());
}
if(isset($_REQUEST['del'])){
    //DELETE FROM `test`.`tableish` WHERE `tableish`.`ID` = 3
    $id = (int)$_REQUEST['del'];
    $sql = "DELETE FROM `tableish` WHERE `ID` = $id";
    mysql_query($sql);
}
$sql = "SELECT * FROM `tableish` ORDER BY `tableish`.`ID` ASC";
$result = mysql_query($sql, $link);
if(mysql_num_rows($result) > 0){
    while($row = mysql_fetch_array($result)){
        echo $row['name']."<a href=\"?del=".$row['ID']."\">Delete this row</a><br />\n";
    }
}

?>