session_reset

(PHP 5 >= 5.6.0, PHP 7)

session_reset — Re-initialize session array with original values

说明

session_reset ( void ) : bool

session_reset() reinitializes a session with original values stored in session storage. This function requires an active session and discards changes in $_SESSION.

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE。

更新日志

版本 说明
7.2.0 The return type of this function is bool now. Formerly, it has been void.

参见

User Contributed Notes

parsa dot mhn at outlook dot com 02-Sep-2015 08:14
First of all you should execute this code :
<?php
    session_start();
    $_SESSION["A"] = "Some Value";
?>

then you should execute this one :

<?php
    start_session();
    $_SESSION["A"] = "Some New Value";  // set new value

    session_reset();  // old session value restored
    echo $_SESSION["A"];

    //Output: Some Value
?>

That is because session_reset() is rolling back changes to the last saved session data, which is their values right after the session_start().
vijay dot mits at gmail dot com 21-Apr-2015 09:12
first create a session variable

<?php
    session_start();
    $_SESSION["A"] = "Some Value";
    echo $_SESSION["A"];

    //Output: Some Value

    //if you need to rollback the session values after seting new value to session variables use session_reset()

    $_SESSION["A"] = "Some New Value";  // set new value
   
    session_reset();  // old session value restored
    echo $_SESSION["A"];

    //Output: Some Value
?>