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When working with external scripts and including session_start() in PHP, what considerations should be made to prevent errors and conflicts in the code?

When including external scripts in PHP that use session_start(), it's important to ensure that session_start() is called only once per session to prevent conflicts and errors. One way to achieve this is by checking if the session has already started before calling session_start().

php 
// Check if the session has already started before calling session_start()
if (session_status() == PHP_SESSION_NONE) {
    session_start();
}

// Include external script here
include 'external_script.php';

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