【PHP】$this（擬似変数） - オブジェクト（インスタンス）自身を記憶する変数

<?php

// 人間クラス
class Person {
    
    // 苗字
    public $l_name;
    // 名前
    public $f_name;
    
    // フルネームの取得
    public function full_name() {
        ___ih_hl_start
        $name = $this->l_name . ' ' . $this->f_name;
        ___ih_hl_end
        return $name;
    }
    
    // あいさつ
    public function greeting() {
        echo "Hey!\n";
        ___ih_hl_start
        echo "My name is ". $this->full_name() . ".\n";
        ___ih_hl_end
    }
    
}

$person = new Person();
$person->l_name = 'TANAKA';
$person->f_name = 'TARO';

$person->greeting();

?>

$ php sample.php
Hey!
My name is TANAKA TARO.

<?php

// 人間クラス
class Person {
    
    // 苗字
    public $l_name;
    // 名前
    public $f_name;
    
    // フルネームの取得
    public function full_name() {
        $name = $this->l_name . ' ' . $this->f_name;
        return $name;
    }
    
    // あいさつ
    public function greeting() {
        echo "Hey!\n";
        echo "My name is ". $this->full_name() . ".\n";
    }
    
}

___ih_hl_start
$person1 = new Person();
$person1->l_name = 'TANAKA';
$person1->f_name = 'TARO';

$person2 = new Person();
$person2->l_name = 'SUZUKI';
$person2->f_name = 'JIRO';

$person1->greeting();
$person2->greeting();
___ih_hl_end

?>

$ php sample.php
Hey!
My name is TANAKA TARO.
Hey!
My name is SUZUKI JIRO.