저는 재사용과 단순성을 염두에두고 ORM 라이브러리를 구축하고 있습니다. 어리석은 상속 제한에 갇힌 것을 제외하고는 모든 것이 잘됩니다. 아래 코드를 고려하십시오.

class BaseModel {
    /*
     * Return an instance of a Model from the database.
     */
    static public function get (/* varargs */) {
        // 1. Notice we want an instance of User
        $class = get_class(parent); // value: bool(false)
        $class = get_class(self);   // value: bool(false)
        $class = get_class();       // value: string(9) "BaseModel"
        $class =  __CLASS__;        // value: string(9) "BaseModel"

        // 2. Query the database with id
        $row = get_row_from_db_as_array(func_get_args());

        // 3. Return the filled instance
        $obj = new $class();
        $obj->data = $row;
        return $obj;
    }
}

class User extends BaseModel {
    protected $table = 'users';
    protected $fields = array('id', 'name');
    protected $primary_keys = array('id');
}
class Section extends BaseModel {
    // [...]
}

$my_user = User::get(3);
$my_user->name = 'Jean';

$other_user = User::get(24);
$other_user->name = 'Paul';

$my_user->save();
$other_user->save();

$my_section = Section::get('apropos');
$my_section->delete();

분명히, 이것은 내가 기대했던 행동이 아닙니다 (실제 행동도 의미가 있지만). 그래서 내 질문은 여러분이 부모 클래스에서 자식 클래스의 이름을 얻는 방법을 알고 있는지 여부입니다.

답변

class Base {
    public static function whoAmI() {
        return get_called_class();
    }
}

class User extends Base {}

print Base::whoAmI(); // prints "Base"
print User::whoAmI(); // prints "User"

get_class($this);

class Parent() {
    function __construct() {
        echo 'Parent class: ' . get_class() . "\n" . 'Child class: ' . get_class($this);
    }
}

class Child() {
    function __construct() {
        parent::construct();
    }
}

$x = new Child();

Parent class: Parent
Child class: Child

class Base
{
    public static function init() // Initializes a new instance of the static class
    {
        return new static();
    }

    public static function getClass() // Get static class
    {
        return static::class;
    }

    public function getStaticClass() // Non-static function to get static class
    {
        return static::class;
    }
}

class Child extends Base
{

}

$child = Child::init();         // Initializes a new instance of the Child class

                                // Output:
var_dump($child);               // object(Child)#1 (0) {}
echo $child->getStaticClass();  // Child
echo Child::getClass();         // Child

<?php
abstract class bar {
    public function __construct()
    {
        var_dump(get_class($this));
        var_dump(get_class());
    }
}

class foo extends bar {
}

new foo;
?>

string(3) "foo"
string(3) "bar"

<?php

class Base 
{
    public static function find($id)
    {
        $table = static::$_table;
        $class = static::getClass();
        // $data = find_row_data_somehow($table, $id);
        $data = array('table' => $table, 'id' => $id);
        return new $class($data);
    }

    public function __construct($data)
    {
        echo get_class($this) . ': ' . print_r($data, true) . PHP_EOL;
    }
}

class User extends Base
{
    protected static $_table = 'users';

    public static function getClass()
    {
        return __CLASS__;
    }
}

class Image extends Base
{
    protected static $_table = 'images';

    public static function getClass()
    {
        return __CLASS__;
    }
}

$user = User::find(1); // User: Array ([table] => users [id] => 1)  
$image = Image::find(5); // Image: Array ([table] => images [id] => 5)

class BaseModel
{

    public function get () {
        echo get_class($this);

    }

    public static function instance () {
        static $Instance;
        if ($Instance === null) {
            $Instance = new self;

        }
        return $Instance;
    }
}

class User
extends BaseModel
{
    public static function instance () {
        static $Instance;
        if ($Instance === null) {
            $Instance = new self;

        }
        return $Instance;
    }
}

class SpecialUser
extends User
{
    public static function instance () {
        static $Instance;
        if ($Instance === null) {
            $Instance = new self;

        }
        return $Instance;
    }
}


BaseModel::instance()->get();   // value: BaseModel
User::instance()->get();        // value: User
SpecialUser::instance()->get(); // value: SpecialUser

BaseModel::get('User', 1);

class BaseModel {
    public static function get() {
        $args = func_get_args();
        $className = array_shift($args);

        //do stuff
        echo $className;
        print_r($args);
    }
}

class User extends BaseModel {
    public static function get() { 
        $params = func_get_args();
        array_unshift($params, __CLASS__);
        return call_user_func_array( array(get_parent_class(__CLASS__), 'get'), $params); 
    }
}


User::get(1);