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PHP, ??? ? ??

Dec 29, 2024 pm 02:42 PM

PHP, Classes and Objects

PHP? ???? ??

PHP? Java? ????? ?? ?? ?????? ???? ???? ??? ?? ?? ??? ?????. ??? ??? ???? ?? PHP? ????? ? ??????. ? ???? PHP? ???? ??? ?? ??? ? ?? ?? ????.

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PHP? ???? ?? ??? ?? ??????. ???? ??? ?? ??? ??? ?????.

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class ClassName {
    // Properties (Fields)
    // Methods
}

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class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ??

??? ???? ???????. new ???? ???? ????? ??? ?????.

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$objectName = new ClassName();

? 

class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

?? ? ??

??(????? ?)? ??? ??? ????, ???? ??? ??? ?????.

??

??? ??? ???? ???? ?????.

? 

class Car {
    public $color;
    public $model;
    public $year;
}

?? ??

???? ??? ??? ???? ??? ?? ??? ?????.

? 

class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

???

???? ??? ?????? ? ???? ???? ?? ??????. ?? ??? ??? ??????.

?? ???

???? ???? ?? ?? PHP? ??? ?? ?? ???? ?????.

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class Car {
    public $color;
    public $model;
    public $year;

    // Default constructor
    public function __construct() {
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?????? ???

?????? ???? ???? ?? ??? ??? ???? ? ????.

? 

class Car {
    public $color;
    public $model;
    public $year;

    // Parameterized constructor
    public function __construct($color, $model, $year) {
        $this->color = $color;
        $this->model = $model;
        $this->year = $year;
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?????? ??? ?? 

class Main {
    public function run() {
        $myCar = new Car("Red", "Tesla", 2022);
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

??? ????

PHP? ????? Java? ?? ??? ????? ???? ??? ??? ????? ????? ?? ??? ??? ???? ??? ???? ?? ?????? ? ????.

? 

class Car {
    public $color;
    public $model;
    public $year;

    // Simulating constructor overloading
    public function __construct($color = "Unknown", $model = "Unknown", $year = 0) {
        $this->color = $color;
        $this->model = $model;
        $this->year = $year;
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?????? ????? ??? ?? 

class Main {
    public function run() {
        $defaultCar = new Car();
        $defaultCar->displayInfo();

        $myCar = new Car("Red", "Tesla", 2022);
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

PHP? ???, ??? ??? ? ?? ??

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PHP? ???? ??? ??? ???(??)? ???(??)? ?? ?????. ?? ??? ?????? ??? ?? ??? ???? ?????.

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PHP? ??? ???? ??, ??? ? ???? ???? ???? ?????. PHP? ? ?? ?? ??? ???? ?????:

  • ??: ???? ??? ??
  • ???: ???, ?? ??? ? ??? ??? ??? ???? ? ????.
  • private: ?? ??? ???? ?? ?????.

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class ClassName {
    // Properties (Fields)
    // Methods
}

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PHP? ?? ??? ?? ????? ?? ??? ??? ?????. ??? ??? ???? ??? ??? ?????.

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?? ??? ???? ?? ?????? ?????. static ???? ???? ?????.

class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ??:

?? ???? static ???? ???? ?????. ????? ?? ???? ????.

$objectName = new ClassName();

?? ??? ???:

?? ??? ??? ??? ?? ??? ??? ???? ??????.

class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

PHP? ??? ???

PHP? ??? ???? ??? ??? ???? ???? ???? ???? ??? ??? ?????.

??? ???? ??

  1. ??
  2. ???
  3. ???

1. ??

  • ??? ?? ??:????
  • ??: ?? ????? ?? ??? ?? public? ?????. 
class Car {
    public $color;
    public $model;
    public $year;
}

2. ???

  • ??? ?? ??: ??? ? ?? ??? ?
  • ???: ??? ?? ?? ???? ????? ?? ???? protected? ?????. 
class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

3. ???

  • ?? ?? ??: ?? ???? ??
  • ???: ?? ??? ???? ????? ? ?? ???? private? ?????. 
class Car {
    public $color;
    public $model;
    public $year;

    // Default constructor
    public function __construct() {
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

PHP? ???? ???

PHP? ???? ???? ???? ??? ?? ?? ??? ??? ??? ?????.

???? ???? ??

  1. ??
  2. ??
  3. ??

1. ??

  • ??: ????? ?? ???? ??? ??? ???? ?????.
  • ?: 
class ClassName {
    // Properties (Fields)
    // Methods
}

2. ??

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  • ??: PHP? ?? ??? ???? ????.
  • ???: ?? ???? ???? ? ????.
  • ??: ????? ??? ? ????.
  • ?: 
class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

3. ??

  • ??: ????? ?? ????? ????? ?? ???? ???? ?????.
  • ?? ???: ?????? ? ????.
  • ?? ???: ?? ?? ???? ?????? ????? ???.
  • ?: 
$objectName = new ClassName();

PHP ? ??? ???? ??

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PHP? ??? ? ???(?? ???)? ?? ???(?????)? ??? ???? ??? ? ?? ???????. ?? ?? ???? ???? ?? ??? ?? ??? ?? ??? ?????.

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class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

? 

class Car {
    public $color;
    public $model;
    public $year;
}

? ????:

  • Animal? $name ??? eat() ???? ?? ????????.
  • Dog? Animal?? $name ? eat()? ???? ??? ???bark()? ???? ?? ??????.

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PHP? ??? ???? ?? ???? ????? ?? ???? ??? ??? ???? ?????. ??? ??? ??? ???.

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  • ??: ???? ??? ??
  • ???: ???, ?? ??? ? ??? ??? ??? ???? ? ????.
  • private: ??? ??? ???? ?? ?????. 
class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ?? ? ???? ?? ??? ???

PHP? ?? ??? ?? ????? ?? ???? ?????. ?? ? ??? ??? ??? ??? ??? ????.

class Car {
    public $color;
    public $model;
    public $year;

    // Default constructor
    public function __construct() {
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ???? ??????

?? ???? PHP?? ????? ???? ???? ?? ??? ???? ?? ????. ?? ???? ??? ??? ?? ???? ???? ?? ???? ?? ???? ?????.

class ClassName {
    // Properties (Fields)
    // Methods
}

?? ???? ?? ??? ???

PHP? ?? ???? ?? ????? ????? ???. ?????? ?? ??? ???? ?? ???????? ???? ?????. ?????? ????? ? ???? ??? ???? ???? ?? ???? ???? ???.

class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ?? ? ???? ?? ??? ???

PHP? ?? ???? ?? ???? ???? ? ??? ?? ???? ??? ? ????.

  • ?? ???: ??? ???? ?????.
  • ?? ???: ??? ?????. 
$objectName = new ClassName();

PHP?? ??? ??? ??? ?? ??

PHP?? ??? ???(?? ??? ?? ???? ?? ???) ??? ?? ??? ??? ????. ???? ??? ???, ?? ?? ?? ???, ??? ???? ??? ? ????.

??? ? ?? ???:

  1. ??? ???: ??
  2. ?? ??: ?? ?? ??

????: 

class ClassName {
    // Properties (Fields)
    // Methods
}

???: 

class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ??:

  1. PHP? ???? ???? ?? ?? public? ?? ??? ???? ?????.
  2. ???? abstract??? ??? final? ? ????.
  3. ??? ????? protected ? private ??? ???? ???? ????.

?: 

$objectName = new ClassName();

PHP? ??? ?? ?? ??

??? ? ?? ???:

  1. ??? ???: ??, ??, ???
  2. ?? ???:??
  3. ?? ???: ?? ??(PHP 8.1?? ???)

????: 

class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

???: 

class Car {
    public $color;
    public $model;
    public $year;
}

?? ??:

  1. ??? ???? ???? ?? ?? ??? ????? public?? ?????.
  2. ?? ??? ????? ?? ???? ????.
  3. ?? ?? ??? ?? ??? ???(PHP 8.1)?? ? ?? ???? ? ????.

?: 

class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

PHP ???? ??? ?? ??

??? ? ?? ???:

  1. ??? ???: ??, ??, ???
  2. ?? ???:??
  3. ?? ???: final
  4. ?? ???:??

????: 

class Car {
    public $color;
    public $model;
    public $year;

    // Default constructor
    public function __construct() {
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

???: 

class Car {
    public $color;
    public $model;
    public $year;

    // Parameterized constructor
    public function __construct($color, $model, $year) {
        $this->color = $color;
        $this->model = $model;
        $this->year = $year;
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ??:

  1. ??? ???? ???? ??? ????? ?? ??????.
  2. ?? ???? ????? ?? ???? ????.
  3. final ???? ??????? ???? ? ????.
  4. ?? ???? ?? ????? ???? ?? ??? ?? ? ????.

?: 

class Main {
    public function run() {
        $myCar = new Car("Red", "Tesla", 2022);
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

PHP? ?? ???

PHP? ?? ???? ?? ???? ???? ???? ? ???? Java? ?? ???? ?????. ???? ?? ???(??? ?? ???)? ???? ???(??? ?? ???)? ?? ?????. ?? ???? abstract ???? ???? ???? ?? ?????? ? ????.

1. ?? ??? ??

?? ???? ?? ???? ?? ??? ??? ???. ?? ?? ???? ?? ???? ??? ???? ??? ?? ?? ????? ?? ???? ??? ?????.

2. ?? ??? ??

PHP?? ?? ???? ????? ??? ??? ?? ?? ???? ?????.

?: 

class ClassName {
    // Properties (Fields)
    // Methods
}

3. ?? ??

?? ???? ?? ???? ???? ??? ??? ????. ?????? ?? ?? ???? ???? ???.

?: 

class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

4. ???? ??

?? ???? ???? ????? ??? ??? ?? ????? ??? ????? ???? ? ????.

?: 

$objectName = new ClassName();

5. ????? ??

?? ???? ?? ???? ?? ???? ???? ???? ?? ? ?? ?? ???? ???? ???.

?: 

class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

6. ?? ??? ?????

?? ???? ?? ?????? ? ????. ????? ????? ???? ?? ???? ???? ???.

?: 

class Car {
    public $color;
    public $model;
    public $year;
}

7. ?? ???? ???

?? ????? ???? ?? ? ??? ?? ???? ?? ???? ?????? ? ?????.

?: 

class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

8. ??? ???? ?? ?? ???

?? ????? ???? ??? ???? ???? ???? ?? ???? ??? ??? ??? ??? ? ????.

?: 

class Car {
    public $color;
    public $model;
    public $year;

    // Default constructor
    public function __construct() {
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

9. ?? ???? ?? ???

?? ????? ?? ???? ??? ? ????. ?? ???? ???? ??? ??????? ??? ??? ? ????.

?: 

class ClassName {
    // Properties (Fields)
    // Methods
}

PHP?? ?? ??? ??? ?? ??

??? ? ?? ???:

  1. ??
  2. ??, ??, ???(??? ???)

????: 

class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?:

?? ? ??? ???? ?? ?? ??? 

$objectName = new ClassName();

??? ?? ???? ??? ?? ??? 

class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

?? ??:

  1. ?? ???? ?? ?????? ? ????.
  2. ?? ???? ??? ?? ?? ???? ????? ???.
  3. ?? ?? ???? ???? ?? ?? ???? ???? ???? ???.
  4. ?? ???? ???? ???? ?? ???? ???? ? ?? ?? ?????.
  5. ?? ????? ???, ?? ? ??? ?? ? ????.
  6. ?? ???? ???? ??? ?? ?? ??? ???? ??? ? ????.

PHP? ?????

PHP? ?????? ?? ???? ???? ?? ??? ?????. ???? ???? ?? ???? ????? ??? ?? ??? ????? ????. ?????? ???? ?? ??? ??? ??? ????? ???? ?? ?? ??? ???? ?? ??? ???? ??? ??? ? ????.

1. ????? ??

PHP? ?????? ?? ???? ????? ?? ?? ??? ??? ??? ? ????. ?????? ???? ???? ?????? ??? ?? ???? ?? ??? ???? ???. ???? ?? ?????? ??? ? ???? ?????? ??? ?? ??? ?? PHP ??? ?? ??? ???.

2. ????? ??

?????? ????? ????? ???? ?????. ??????? ??? ??(??? ?? ??), ?? ? ?? ???? ??? ? ????.

?: 

class Car {
    public $color;
    public $model;
    public $year;
}

3. ????? ??

?????? ???? ???? ?????? ??? ?? ???? ?? ??? ???? ???. ???? ??? ???? ?? ?????? ??? ? ????.

?: 

class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

4. ????? ??? ??

?????? ???? ??? ?? ? ??? ????? ???. ???? ?????? ??? ? ??? ??? ???? ?????? ??? ?? ???? ??? ???? ???? ???.

?: 

class Car {
    public $color;
    public $model;
    public $year;

    // Default constructor
    public function __construct() {
    }

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

5. ?? ????? ??

PHP? ???? ?? ?????? ??? ? ????. ?? ?? ???? ??? ??? ??? ? ?? ???? ???? ? ? ?? ???? ?????.

?: 

class ClassName {
    // Properties (Fields)
    // Methods
}

6. ????? ??

??????? ??? ??? ? ????. ??? ??? ???? ???? ?????? ???? ?? ????? ???? ? ????.

?: 

class Car {
    // Properties
    public $color;
    public $model;
    public $year;

    // Methods
    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

7. ????? ??

?????? ?? ?????? ??? ? ????. ?? ?? ?????? ?? ?????? ?? ???(??)? ???? ? ???? ??? ?? ??? ?????. ?? ?????? ???? ???? ?? ?????? ?? ????? ??? ?? ???? ???? ???.

?: 

$objectName = new ClassName();

8. ?????? ?? ???

??????? ?? ???? ??? ? ????. ?????? ??? ?? ???? ???? ????? ???. ?????? ?? ???? ?? ???? ?? ??? ????? ???????? ?? ???? ???? ????.

PHP?? ????? ?? ? ?? ??

??? ? ?? ???:

  1. ?????
  2. ??

????: 

class Main {
    public function run() {
        $myCar = new Car(); // Creating an object of the Car class
        $myCar->color = "Red";
        $myCar->model = "Tesla";
        $myCar->year = 2022;
        $myCar->displayInfo();
    }
}

$main = new Main();
$main->run();

?:

??? ???? ????? 

class Car {
    public $color;
    public $model;
    public $year;
}

?? ???? ????? 

class Car {
    public $color;
    public $model;
    public $year;

    public function displayInfo() {
        echo "Model: " . $this->model . "\n";
        echo "Color: " . $this->color . "\n";
        echo "Year: " . $this->year . "\n";
    }
}

?? ??:

  1. ????? ???: ?????? ???? ????? ?? ??? ?? ? ????.
  2. ?? ????? ??: ???? ?? ?????? ??? ???? ??? ? ????.
  3. ??? ???: ?????? ?? ???? ????? ?????. private ?? protected? ?? ??? ???? ???? ????.
  4. ????? ??: ?????? ???? ???? ???? ???? ???? ? ?? ??? ??? ? ????.
  5. ????? ??: ?????? ??? ????? ???? ?? ??? ?????? ??? ? ????.
  6. ?? ???: ?????? ?? ???? ??? ? ????.
  7. ?? ??? ??: ???? ???? ?????? ?? ??? ?? ???? ???? ???.

? ??? PHP, ??? ? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? ????? ??
? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

? AI ??

Undresser.AI Undress

Undresser.AI Undress

???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover

AI Clothes Remover

???? ?? ???? ??? AI ?????.

Video Face Swap

Video Face Swap

??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

???

??? ??

???++7.3.1

???++7.3.1

???? ?? ?? ?? ???

SublimeText3 ??? ??

SublimeText3 ??? ??

??? ??, ???? ?? ????.

???? 13.0.1 ???

???? 13.0.1 ???

??? PHP ?? ?? ??

???? CS6

???? CS6

??? ? ?? ??

SublimeText3 Mac ??

SublimeText3 Mac ??

? ??? ?? ?? ?????(SublimeText3)

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PHP?? ?? ? ??? ????? ????????? PHP?? ?? ? ??? ????? ????????? Jun 20, 2025 am 01:03 AM

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