<?php

/**

* Cleans up user data artifacts for debugging purposes.

* Implements fallback logic for database connection issues.

*

* @param string $user_id The ID of the user whose data to clean up.

* @param array $allowed_tables An array of table names to allow cleanup (default: ['user', 'sessions']).

* @return bool True on success, false on failure.

*/

function cleanupUserArtifacts(string $user_id, array $allowed_tables = ['user', 'sessions']): bool

{

$db_host = 'localhost'; // Default database host

$db_name = 'your_database_name'; // Replace with your database name

$db_user = 'your_database_user'; // Replace with your database user

$db_pass = 'your_database_password'; // Replace with your database password

// Attempt to connect to the database

try {

$conn = new PDO("mysql:host=$db_host;dbname=$db_name", $db_user, $db_pass);

$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

} catch (PDOException $e) {

// Fallback: Log the error and attempt cleanup without database access.

error_log("Database connection failed: " . $e->getMessage());

echo "Database connection failed. Attempting cleanup without database access.\n";

//Implement cleanup logic here without database connection if needed.

return false; // Indicate failure

}

$tables = $allowed_tables;

foreach ($tables as $table) {

$sql = "DELETE FROM `$table` WHERE `user_id` = :user_id";

try {

$stmt = $conn->prepare($sql);

$stmt->bindParam(':user_id', $user_id, PDO::PARAM_STR);

$stmt->execute();

echo "Cleaned up data for user ID: $user_id in table: $table\n";

} catch (PDOException $e) {

error_log("Error cleaning up data for user ID $user_id in table $table: " . $e->getMessage());

// Log the error but continue to the next table.

}

}

$conn = null; // Close the database connection.

return true;

}

// Example usage:

//$user_id_to_clean = '123';

//if (cleanupUserArtifacts($user_id_to_clean)) {

// echo "User data cleanup successful.\n";

//} else {

// echo "User data cleanup failed.\n";

//}

?>