What is the significance of the error message "Fatal error: Call to undefined function session_start()" in PHP?

The error message "Fatal error: Call to undefined function session_start()" in PHP indicates that the session_start() function is not recognized or available. This function is essential for starting a session in PHP to store and retrieve session variables. To solve this issue, you need to ensure that the session module is enabled in your PHP configuration file (php.ini) or by enabling it in your script using the session_start() function. 

<?php
// Check if the session is not already started
if (session_status() == PHP_SESSION_NONE) {
    session_start();
}

// Your PHP code here
?>

Keywords

Fatal error Call to undefined function session_start PHP

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