Variables in PHP Sessions-PHP Tutorial-php.cn

Variables in PHP Sessions

墨辰丷

Release： 2023-03-25 20:34:02

Original

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This article mainly introduces the variable Sessions in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

Before you can store user information in a PHP session, you must first start the session.

Comments: session_start() The function must be located before the tag:

<?php session_start(); ?>
<html>
<body>
</body>
</html>

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#Storing and retrieving Session variables

The correct way to store and retrieve session variables is to use PHP$_SESSION Variable:

<?php
session_start();
// store session data
$_SESSION[&#39;views&#39;]=1;
?>
<html>
<body>
<?php
//retrieve session data
echo "Pageviews=". $_SESSION[&#39;views&#39;];
?>
</body>
</html>

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#Destroy Session

If you want to delete some session data, you can use the unset() or session_destroy() function.

unset() function is used to release the specified session variable:

<?php
session_start();
if(isset($_SESSION[&#39;views&#39;]))
unset($_SESSION[&#39;views&#39;]);
?>

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Completely destroy the session by calling the

session_destroy() function: ##

<?php
session_destroy();
?>

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Comments:

session_destroy( ) The session will be reset and you will lose all stored session data.
E-mail Prevent injection

##FILTER_SANITIZE_EMAIL filter from string Remove illegal characters from email

FILTER_VALIDATE_EMAIL Filter validates the value of email address
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