How can session variables be utilized to prevent double counting of visitors in a PHP script?

To prevent double counting of visitors in a PHP script, session variables can be utilized to keep track of unique visitors. By setting a session variable when a visitor accesses the site, you can check if the variable is already set before incrementing the visitor count. This way, each visitor will only be counted once during their session. 

session_start();

if(!isset($_SESSION['visited'])){
    $_SESSION['visited'] = true;
    // Increment visitor count here
}

Keywords

session variables double counting visitors PHP script prevent

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