$_SESSION in php
a session can be understood as we work somewhere, performing some tasks, giving inputs, and changing data, and then after the work, we got our exit.
these tasks are performed because of some login or logout system on the website. this system defines the system who you are.
but in the world of internet servers didn't know who you are. this problem is solved by session superglobals that is used to store information across the pages.
the values or data stored in $_SESSION, by default, exists until the browser is closed.
always start the session before using the $_SESSION superglobal.
when we talk about the identity of a user on a website, that is generally based on login or logout.
let's take an example of simple login and admin page:login.php
<?php
if(isset($_POST['save']))
{
// Start the session
session_start();
// Set session variables
$_SESSION["eml"] = $_POST['useremail'];
$_SESSION["pass"] = $_POST['userpass'];
session_start();
// Set session variables
$_SESSION["eml"] = $_POST['useremail'];
$_SESSION["pass"] = $_POST['userpass'];
echo "Session variables are set.";
}
?>
<html>
<body>
<form method="post">
?>
<html>
<body>
<form method="post">
<input type="email" name="useremail">
<input type="password" name="userpass">
<input type="submit" name="save">
</form>
</body>
</html>
</body>
</html>
admin.php
<?php
session_start();
echo "Welcome to admin page<br>";
echo $_SESSION['eml'];
echo $_SESSION['pass'];
?>
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