How can a whitelist approach be implemented to restrict the inclusion of specific PHP files in a script?

To implement a whitelist approach to restrict the inclusion of specific PHP files in a script, you can define an array of allowed file paths and check if the file being included is in the whitelist before including it. This helps prevent unauthorized or malicious files from being included in your script. 

<?php

$allowed_files = array(
    'safe_file_1.php',
    'safe_file_2.php'
);

$requested_file = $_GET['file']; // Assuming the file to include is passed via a GET parameter

if (in_array($requested_file, $allowed_files)) {
    include $requested_file;
} else {
    echo "Unauthorized file inclusion attempt.";
}
?>

Keywords

whitelist approach restrict inclusion PHP files script implementation

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