What potential issues can arise when automating website logins using PHP scripts?

Potential issues that can arise when automating website logins using PHP scripts include security vulnerabilities, such as storing login credentials in plain text, not handling session management correctly, and not properly validating user input. To solve these issues, it is recommended to use secure methods for storing credentials, implement proper session handling, and sanitize and validate user input to prevent SQL injection and other attacks. 

// Example of securely storing login credentials using environment variables
$hostname = getenv('DB_HOST');
$username = getenv('DB_USER');
$password = getenv('DB_PASS');
$database = getenv('DB_NAME');

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->execute(['username' => $username]);
$user = $stmt->fetch();

Keywords

cURL session management CSRF tokens password hashing HTTP headers

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