复制代码 代码如下:

<?php

/**

* 解释器 示例

*

* @create_date: 2010-01-04

*/

class Expression

{

function interpreter($str)

{

return $str;

}

}

class ExpressionNum extends Expression

{

function interpreter($str)

{

switch($str)

{

case "0": return "零";

case "1": return "一";

case "2": return "二";

case "3": return "三";

case "4": return "四";

case "5": return "五";

case "6": return "六";

case "7": return "七";

case "8": return "八";

case "9": return "九";

}

}

}

class ExpressionCharater extends Expression

{

function interpreter($str)

{

return strtoupper($str);

}

}

class Interpreter

{

function execute($string)

{

$expression = null;

for($i = 0;$i<strlen($string);$i++) {

$temp = $string[$i];

switch(true)

{

case is_numeric($temp): $expression = new ExpressionNum(); break;

default: $expression = new ExpressionCharater();

}

echo $expression->interpreter($temp);

}

}

}

$obj = new Interpreter();

$obj->execute("12345abc");

?>