In PHP, what best practices should be followed to avoid issues with object instantiation and method calls within a script?

To avoid issues with object instantiation and method calls in PHP, it is recommended to follow best practices such as using dependency injection, separating concerns by creating classes with single responsibilities, and utilizing interfaces for flexibility and testability. This helps in creating more maintainable and testable code, reducing dependencies, and promoting code reusability. 

// Example of using dependency injection to avoid direct instantiation and method calls within a script

interface Logger {
    public function log($message);
}

class FileLogger implements Logger {
    public function log($message) {
        // Log message to a file
    }
}

class UserManager {
    private $logger;

    public function __construct(Logger $logger) {
        $this->logger = $logger;
    }

    public function registerUser($username) {
        // Register user logic
        $this->logger->log("User registered: " . $username);
    }
}

$fileLogger = new FileLogger();
$userManager = new UserManager($fileLogger);
$userManager->registerUser("john_doe");

Keywords

object instantiation method calls PHP script errors

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