How can PHP developers ensure that no output is generated before session_start() is called to avoid errors?

To ensure that no output is generated before calling session_start() in PHP, developers can use output buffering. This technique allows PHP to capture all output generated by the script before sending it to the browser, preventing any headers from being sent prematurely. By starting output buffering at the beginning of the script, developers can safely call session_start() without encountering errors related to headers already being sent. 

<?php
ob_start(); // Start output buffering

session_start(); // Call session_start() after output buffering is started

// Rest of the PHP script goes here

ob_end_flush(); // Flush the output buffer and send the output to the browser
?>

Keywords

PHP session_start() output buffering headers errors

Related Questions