Home > Article > Backend Development > Code refactoring and design patterns in PHP framework
Code refactoring is a process of optimizing software structure, involving techniques such as renaming and extraction methods. Design patterns are general-purpose solutions to common software problems, such as the Singleton pattern and the Observer pattern. By refactoring and using design patterns, you can improve the maintainability, readability, and scalability of your code.
Code refactoring and design patterns in the PHP framework
Code refactoring is to change the software structure without changing its behavior. to make it easier to maintain, more readable, and more scalable. Design patterns are common solutions that help solve common software problems.
Code Refactoring
There are many code refactoring techniques, including:
Practical case
Consider the following code:
function get_user_data($id) { $user = $this->db->query("SELECT * FROM users WHERE id = $id"); if ($user->num_rows() > 0) { return $user->row_array(); } else { return null; } }
We can use the extraction method to reconstruct:
function get_user_data($id) { return $this->get_user($id); } private function get_user($id) { $user = $this->db->query("SELECT * FROM users WHERE id = $id"); if ($user->num_rows() > 0) { return $user->row_array(); } else { return null; } }
Design Patterns
Design patterns are universal solutions to software design problems. For example:
Practical case
Consider the following code:
class User { public function __construct($name) { $this->name = $name; } public function say_hello() { echo "Hello, my name is {$this->name}."; } }
We can use the singleton mode to ensure that only one ## is created and used #User Object:
class User { private static $instance = null; private function __construct($name) { $this->name = $name; } public static function get_instance($name) { if (self::$instance === null) { self::$instance = new self($name); } return self::$instance; } public function say_hello() { echo "Hello, my name is {$this->name}."; } }
The above is the detailed content of Code refactoring and design patterns in PHP framework. For more information, please follow other related articles on the PHP Chinese website!