What are some potential complications when trying to automatically delete a database entry after a user leaves a page in PHP?

One potential complication when trying to automatically delete a database entry after a user leaves a page in PHP is that there is no direct way to detect when a user leaves a page. One way to solve this is to set a session timeout and delete the database entry if the session expires. 

// Start the session
session_start();

// Set session timeout to 30 minutes
$session_timeout = 1800; // 30 minutes in seconds

// Check if the user has been inactive for the session timeout period
if(isset($_SESSION['last_activity']) && (time() - $_SESSION['last_activity'] > $session_timeout)) {
    // Delete database entry here
    // Replace 'delete_entry_function' with the function that deletes the entry from the database
    delete_entry_function($entry_id);
}

// Update last activity timestamp
$_SESSION['last_activity'] = time();

Keywords

PHP database entry deletion session management error handling

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