@blog.justoneplanet.info

■コード

interface Text {
    public function getText();
    public function setText($str);
}

PlainText.php

class PlainText implements Text
{
    private $_textString = null;
    public function getText()
    {
        return $this->_textString;
    }
    public function setText($str)
    {
        $this->_textString = $str;
    }
}

abstract class TextDecorator implements Text
{
    private $_text;
    public function __construct(Text $target) {
	    $this->_text = $target;
    }
    public function getText() {
        return $this->_text->getText();
    }
    public function setText($str) {
        $this->_text->setText($str);
    }
}

UpperCaseText.php

class UpperCaseText extends TextDecorator {
    public function __construct(Text $target) {
        parent::__construct($target);
    }
    public function getText() {
        $str = parent::getText();
        $str = strtoupper($str);
        return $str;
    }
}

DoubleByteText.php

class DoubleByteText extends TextDecorator {
    public function __construct(Text $target) {
        parent::__construct($target);
    }
    public function getText() {
        $str = parent::getText();
        $str = mb_convert_kana($str, 'RANSKV');
        return $str;
    }
}

$text = new PlainText();
$text->setText('This is a pen.');
$dbText = new DoubleByteText($text);
var_dump($dbText->getText());//string(42) "Ｔｈｉｓ　ｉｓ　ａ　ｐｅｎ．"
$ucText = new UpperCaseText($text);
var_dump($ucText->getText());//string(14) "THIS IS A PEN."