check session in php code example

Example 1: check session php

// For PHP versions > 5.4.0

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

// For PHP Versions < 5.4.0

if(session_id() == '') {
    session_start();
}

Example 2: php check session status

session_status();

// Possible results:
//  - PHP_SESSION_DISABLED = 0
//  - PHP_SESSION_NONE     = 1
//  - PHP_SESSION_ACTIVE   = 2