What are the advantages and disadvantages of using abstract classes in PHP for creating user-specific functionalities?

Using abstract classes in PHP for creating user-specific functionalities allows for creating a base class with common methods and properties that can be extended by user-specific classes. This can help in organizing code and promoting code reuse. However, it may limit flexibility as each user-specific class must adhere to the structure defined in the abstract class. 

<?php

abstract class User {
    protected $name;

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

    abstract public function greet();
}

class Admin extends User {
    public function greet() {
        return "Hello Admin " . $this->name;
    }
}

class Customer extends User {
    public function greet() {
        return "Hello Customer " . $this->name;
    }
}

$admin = new Admin("John");
echo $admin->greet(); // Output: Hello Admin John

$customer = new Customer("Jane");
echo $customer->greet(); // Output: Hello Customer Jane

?>

Keywords

abstract classes PHP user-specific functionalities advantages disadvantages

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