Example of Nested Class Structure in PHP

In order to write more organized code in PHP, sometimes we need to create nested classes, but since PHP isn’t as robust as C# in terms of class structures, we might have difficulty creating them.

Here is an example of a nested class structure in PHP that you can use in such cases.

Class Structure Example

Since PHP does not support nested class structures, to create one, we need to use a function and return a class from it.

<?php
    class Config {
        // Database connection settings
        public static function database(): object
        {
            return new class {

                // Mongo db connection settings
                public static function mongo(): object
                {
                    return new class {
                        public static string $host = "localhost";
                        public static int $port = 27017;
                        public static string $username = "mongo_username";
                        public static string $password = "mongo_password";
                        public static string $database = "mongo_database";
                    };
                }

                // Mysql db connection settings
                public static function mysql(): object
                {
                    return new class {
                        public static string $host = "localhost";
                        public static int $port = 3306;
                        public static string $username = "mysql_username";
                        public static string $password = "mysql_password";
                        public static string $database = "mysql_database";
                    };
                }
            };
        }

        // Email connection settings
        public static function email(): object
        {
            return new class {
                public static string $host = "smtp.domain.com";
                public static int $port = 465;
                public static string $email = "email_account@domain.com";
                public static string $username = "email_account@domain.com";
                public static string $password = "email_password";
            };
        }
    }

Usage Example

To use the nested class we prepared above, you need to use the following method.

    
$mysqlConfig = Config::database()->mysql();
echo $mysqlConfig::$host;

You can use the class you wrote with the usage example above.

UrhobA

Example of Nested Class Structure in PHP