what is session_reset() exactly?

Question

I want to know what is session_reset() for and when should we use it ? when I use it I get an error like this: "Call to undefined index session_reset()". I hope you know something about it . Thank you in advance.

Answer 1

session_reset — Re-initialize session array with original values.

Example

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
?>