php小白有关问题

php小白问题

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?phpclass Enum{    protected $self=array();    public function _construct()    {        $args=func_get_args();        for($i=0,$n=count($args);$i<$n;$i++)            $this->add($args[$i]);    }    public function _get($name=null)    {        return $this-&gt;self[$name];    }    public function add($name=null,$enum=null)    {        if(isset($enum)) $this-&gt;self[$name]=$enum;        else $this-&gt;sef[$name]=end($this-&gt;self)+1;    }}class DefinedEnum extends Enum{    public function _construct($itms)    {        foreach($itms as $name=&gt;$enum)        $this-&gt;add($name,$enum);    }}class FlagsEnum extends Enum{    public function _construct()    {        $args=func_get_args();        for($i=0,$n=count($args),$f=0x1;$iadd($args[i],$f);    }}$eFruits=new Enum("APPLE","ORANGE","PEACH");echo $eFruits-&gt;APPLE.",";echo $eFruits-&gt;ORANGE.",";echo $eFruits-&gt;PEACH."\n";$eBeers=new DefinedEnum("GUINESS"=&gt;25,"MIRROR_POND"=&gt;49);echo $eBeers-&gt;GUINESS.",";echo $eBeers-&gt;MIRROR_POND."\n";$eFlags=new FlagsEnum("HAS_ADMIN","HAS_SUPER","HAS_POWER","HAS_GUEST");echo $eFlags-&gt;HAS_ADMIN.",";echo $eFlags-&gt;HAS_SUPER.",";echo $eFlags-&gt;HAS_POWER.",";echo $eFlags-&gt;HAS_GUEST."\n";?&gt;

这段代码我怎么看不懂啊
哪里来的$eFruits->APPLE
 $eFruits->ORANGE
$eFruits->PEACH
不要见笑啊




------解决方案--------------------
1、你先把程序修改正确了：方法名前有下划线的方法名一律改成两个下划线的
如 _construct 改为 __construct

2、修改 __get 方法成这样
public function __get($name=null)
{
echo "读取属性 $name";
return $this->self[$name];
}
3、运行修改后的代码，你就可以知道是怎么回事了

------解决方案--------------------

PHP code

 class Enum{    protected $self=array();    public function __construct()    {        $args=func_get_args();        for($i=0,$n=count($args);$iadd($args[$i]);    }    public function __get($name=null)    {        return $this-&gt;self[$name];    }    public function add($name=null,$enum=null)    {        if(isset($enum)){            $this-&gt;self[$name]=$enum;        }else{                   $this-&gt;self[$name]=end($this-&gt;self)+1;        }            }}class DefinedEnum extends Enum{    public function __construct($itms)    {        foreach($itms as $name=&gt;$enum)        $this-&gt;add($name,$enum);    }}class FlagsEnum extends Enum{    public function __construct()    {        $args=func_get_args();        for($i=0,$n=count($args),$f=0x1;$iadd($args[$i],$f);        }    }} $eFruits=new Enum("APPLE","ORANGE","PEACH");echo $eFruits-&gt;APPLE.",";echo $eFruits-&gt;ORANGE.",";echo $eFruits-&gt;PEACH."\n";$eBeers=new DefinedEnum(array("GUINESS"=&gt;25,"MIRROR_POND"=&gt;49));echo $eBeers-&gt;GUINESS.",";echo $eBeers-&gt;MIRROR_POND."\n"; $eFlags=new FlagsEnum("HAS_ADMIN","HAS_SUPER","HAS_POWER","HAS_GUEST");echo ($eFlags-&gt;HAS_ADMIN).",";echo ($eFlags-&gt;HAS_SUPER).",";echo $eFlags-&gt;HAS_POWER.",";echo $eFlags-&gt;HAS_GUEST."\n";<br><font color="#e78608">------解决方案--------------------</font><br>两个下划线就都对了。<div class="clear">
                 
              
              
        
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