What role does the session_start function play in maintaining session data integrity in PHP applications?

The session_start function in PHP is essential for maintaining session data integrity in PHP applications. It initializes a session or resumes the current one based on a session identifier passed via a GET or POST request, or a cookie. Without calling session_start, session data cannot be accessed or stored across multiple pages. 

<?php
session_start();

// Access or store session data here
?>

Keywords

session_start session data integrity PHP applications session management

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