php小白有關問題

php小白問題

PHP code

add($args[$i]);    }    public function _get($name=null)    {        return $this->self[$name];    }    public function add($name=null,$enum=null)    {        if(isset($enum)) $this->self[$name]=$enum;        else $this->sef[$name]=end($this->self)+1;    }}class DefinedEnum extends Enum{    public function _construct($itms)    {        foreach($itms as $name=>$enum)        $this->add($name,$enum);    }}class FlagsEnum extends Enum{    public function _construct()    {        $args=func_get_args();        for($i=0,$n=count($args),$f=0x1;$i<$n;$i++,$f*=0x2)        $this->add($args[i],$f);    }}$eFruits=new Enum("APPLE","ORANGE","PEACH");echo $eFruits->APPLE.",";echo $eFruits->ORANGE.",";echo $eFruits->PEACH."\n";$eBeers=new DefinedEnum("GUINESS"=>25,"MIRROR_POND"=>49);echo $eBeers->GUINESS.",";echo $eBeers->MIRROR_POND."\n";$eFlags=new FlagsEnum("HAS_ADMIN","HAS_SUPER","HAS_POWER","HAS_GUEST");echo $eFlags->HAS_ADMIN.",";echo $eFlags->HAS_SUPER.",";echo $eFlags->HAS_POWER.",";echo $eFlags->HAS_GUEST."\n";?>

這段代碼我怎麼看不懂啊
哪裡來的$eFruits->APPLE
$eFruits->ORANGE
$eFruits->PEACH
不要見笑啊




------解決方案--------------------
1、你先把程式修改正確了：方法名前有底線的方法名一律改成兩個底線的
如 _construct 改為 __construct

2、修改 __get 方法成這樣
public function __get($name=null)
{
echo "讀取屬性 $name";
return $this->self[$name];
}
3、運行修改後的代碼，你就可以知道是怎麼回事了

------解決方案--------------------

PHP code

 class 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 $this->self[$name];    }    public function add($name=null,$enum=null)    {        if(isset($enum)){            $this->self[$name]=$enum;        }else{                   $this->self[$name]=end($this->self)+1;        }            }}class DefinedEnum extends Enum{    public function __construct($itms)    {        foreach($itms as $name=>$enum)        $this->add($name,$enum);    }}class FlagsEnum extends Enum{    public function __construct()    {        $args=func_get_args();        for($i=0,$n=count($args),$f=0x1;$i<$n;$i++,$f*=0x2){                         $this->add($args[$i],$f);        }    }} $eFruits=new Enum("APPLE","ORANGE","PEACH");echo $eFruits->APPLE.",";echo $eFruits->ORANGE.",";echo $eFruits->PEACH."\n";$eBeers=new DefinedEnum(array("GUINESS"=>25,"MIRROR_POND"=>49));echo $eBeers->GUINESS.",";echo $eBeers->MIRROR_POND."\n"; $eFlags=new FlagsEnum("HAS_ADMIN","HAS_SUPER","HAS_POWER","HAS_GUEST");echo ($eFlags->HAS_ADMIN).",";echo ($eFlags->HAS_SUPER).",";echo $eFlags->HAS_POWER.",";echo $eFlags->HAS_GUEST."\n";
------解決方案--------------------
兩個底線就都對了。 
