php check session code example

Example 1: php start session if not started

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

Example 2: check if session variable exists php

if (isset($_SESSION['errors']))
{
    //Do stuff
}

Example 3: php check session status

session_status();

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