How can PHP sessions be effectively utilized to keep track of processed files and prevent data loss in a script?

To prevent data loss in a script and keep track of processed files, PHP sessions can be effectively utilized to store information across multiple page requests. By storing the processed file information in session variables, the script can maintain state and continue processing where it left off even if the user navigates away from the page. 

<?php
session_start();

// Check if processed files array exists in session, if not create it
if (!isset($_SESSION['processed_files'])) {
    $_SESSION['processed_files'] = [];
}

// Add processed file to session array
$processed_file = 'example.txt';
$_SESSION['processed_files'][] = $processed_file;

// Access processed files array
foreach ($_SESSION['processed_files'] as $file) {
    echo $file . "<br>";
}
?>

Keywords

PHP sessions file processing data loss prevention session variables session management

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