What are the key considerations when parsing and validating data from an ini file before inserting it into a database using PHP?

When parsing and validating data from an ini file before inserting it into a database using PHP, it is important to ensure that the data is properly sanitized to prevent SQL injection attacks. Additionally, you should validate the data to ensure it meets the expected format and constraints before inserting it into the database. Using PHP functions such as parse_ini_file() to parse the ini file and filter_var() or preg_match() for validation can help achieve this.

// Parse the ini file
$config = parse_ini_file('config.ini');

// Validate the data
if (isset($config['key1']) && filter_var($config['key1'], FILTER_VALIDATE_INT)) {
    $key1 = $config['key1'];
} else {
    // Handle validation error
}

// Insert the validated data into the database
// $dbConnection->query("INSERT INTO table_name (key1) VALUES ('$key1')");