Use session verification in php-PHP source code

Some time ago, I was doing a winning activity, and I used it to write data into the session after winning the prize, and then the user submitted the data for verification, the following is not a similar example. Some time ago, I was doing a winning activity, and I used it to write data into the session after winning the prize, and then the user submitted the data for verification, the following is not a similar example.

Script ec (2); script

The logon page is:

Login

Page for storing sessions:

Header ("Content-Type: text/html; charset = utf8 ");
If (! Isset ($ _ POST ["submit"]) {
Die ("error execution ");
} // Check for any submit operation

Require_once ('connect. php'); // link to the database

If (isset ($ _ POST ['name']) & isset ($ _ POST ['Password']) {// if neither user name nor password is blank

$ Name = $ _ POST ['name'];

$ Password = $ _ POST ['Password'];

$ SQL = "SELECT id, limits, message FROM user WHERE username = '$ name' AND password =' $ password' LIMIT 1 ";

$ Result = mysqli_query ($ con, $ SQL); // execute the SQL user name and password

$ Rows = mysqli_num_rows ($ result); // returns whether the user name and password exist.

If ($ rows! = 0 ){

Session_start ();

While ($ rows_other = mysqli_fetch_assoc ($ result )){

$ _ SESSION ['id'] = $ rows_other ['id'];
$ _ SESSION ['name'] = $ name;
$ _ SESSION ['limit'] = $ rows_other ['limit'];
$ _ SESSION ['message'] = $ rows_other ['message'];

}

Header ("refresh: 0; url = welcome. php"); // returns to the welcome.html page

Exit;

} Else {

Echo "incorrect user name or password ";

Echo "script"
Alert ('user name or password error ');
Settimeout(function({{windolocation.href}'login.html ';}, 1000 );
Script ";

}

} Else {

Echo "incomplete form filling ";

Echo "script"
Alert ('Incomplete forms ');
Settimeout(function({{windolocation.href}'login.html ';}, 1000 );
Script ";

}
?>

After logging on to the page, different permissions and user names are displayed based on different users:

Document




Session_start ();

If (isset ($ _ SESSION ['id']) {

Require_once ('connect. php ');

$ Id = $ _ SESSION ['id'];
$ Name = $ _ SESSION ['name'];
$ Limits = $ _ SESSION ['limit'];
$ Message = $ _ SESSION ['message'];

If ($ limits = 1 ){

Echo 'hello, Postmaster '.'
';

} Else {

Echo 'helo, normal user '.'
';
}

Echo 'Hello you name is: '. $ name;

} Else {

Echo 'not logged on! ';

Header ("refresh: 310000url1_login.html ");

}
?>

 


?>

Session considerations

1. When session is to be used on the current page, we add session_start () when there is no input at the beginning of the file ();

2. We can modify the time limit of the session as follows:

In fact, PHP5 Session also provides a function session_set_cookie_params (); To set the lifetime of PHP5 Session. This function must be called before the session_start () function is called:

// Save for one day
$ LifeTime = 24*3600;
Session_set_cookie_params ($ lifeTime );
Session_start ();
?>