Detailed explanation of $_session usage in php

How to use $_SESSION in PHP

When using PHP to apply session, store the data in the session On the server, the client's information is then identified through the sessionID passed by the client, and the information is extracted.
Common operations of session in php: Write, read, register and delete session.
Start of session
The function that marks the start of session use is session_start, and the session_start function is used to initialize the session variable. The syntax is as follows:
session_start();
The return value is TRUE.
Writing and reading of session
In PHP, the use of session is through the calling and reading of the predefined array $_SESSION To be done.
In the website page, assign the $_SESSION array on the registration page, and read the $_SESSION array on other pages.
The session in the registration page, for example:

<?php
session_start();
$_SESSION['keyword']= "php";
?>

The session in other pages, for example:

<?php
session_start();
echo $_SESSION['keyword'];
?>

Run in sequence, the result is:
php

Recommended tutorial: "php tutorial"

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