What is the significance of the error "Cannot send session cache limiter - headers already sent" in PHP?

The error "Cannot send session cache limiter - headers already sent" in PHP occurs when there is output sent to the browser before PHP sends headers related to sessions. To solve this issue, make sure there is no whitespace or any other output before the session_start() function is called in your PHP script. 

<?php
ob_start(); // Start output buffering
session_start(); // Start the session

// Your PHP code here

ob_end_flush(); // Flush the output buffer
?>

Keywords

PHP session cache limiter headers error

Related Questions