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Full session tutorial (3)_PHP tutorial

Jul 13, 2016 pm 05:11 PM

session three example Can custom made application Tutorial

3. Session application examples

The following example snippets are for reference only. You can customize the session or not, as you like
(1) Used for user authentication
<?
session_start();
$dbh=MySQL_connect("localhost:3306","xxxx","xxxx");
MySQL_select_db("znsoft");//Select database
$query="selectuseridfromreguserwhereuserid='$userid'andpass='$pass'";
//$userid$pass is the username and password passed by the login form
$res=MySQL_query($query,$dbh);
if($row=MySQL_fetch($res))
{
$reguser=$row[0];
?>
<script>
alert("ok, buddy, welcome!");
</script>
<?
}
else
{
$reguser="";
?>
<script>
alert("sorry, you are not a registered user!");
</script>
<?

//Put the code yourself
}
session_register("reguser");
?>
Check whether you are logged in on another page
================
<?
session_start();

if(isset($reguser)&&$reguser!="")//Already logged in
{
echo "Welcome, buddy";
}
else//Not logged in
echo "Please register";
?>
Exit function
===============================
<?
session_destroy();
//or $reguser="";
?>

(2) is used to pass variables

This program is used to transfer variables between pages
<?
$name="m.y";
if(!session_is_registered("name"))//The session variable name is not registered
session_register("name");//Register variable name
?>
Second page
===================
<?
echo$name;

//If you don’t want to use it anymore, delete it
if(session_is_registered("name"))//Whether to register, if already registered
session_unregister("name");//Delete it of course
?>

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