类与对象

时间：2011-05-16 16:00:42 来源：站内作者：潘春会

0x00000000;

 // ensures that this class acts like an enum
 // and that it cannot be instantiated
 private function __construct(){}
}
?>

This will allow you to do things like:

<?php
$day_to_email = Days::Thursday;

if($day_to_email == Days::Wednesday) echo "Wednesday ";
if($day_to_email == Days::Thursday) echo "Thursday ";
if($day_to_email == Days::Friday) echo "Friday ";
?>

Which would output:
Thursday

Or if you wanted to get a little fancier you could also do the following:

<?php
$days_to_email = Days::Monday | Days::Wednesday | Days::Friday;

if($days_to_email & Days::Monday) echo "Monday ";
if($days_to_email & Days::Tuesday) echo "Tuesday ";
if($days_to_email & Days::Wednesday) echo "Wednesday ";
if($days_to_email & Days::Thursday) echo "Thursday ";
if($days_to_email & Days::Friday) echo "Friday ";
?>

Which would output:
Monday
Wednesday
Friday

S?b. (28-May-2005 12:50)

We can't create easily anonymous objects like in JavaScript. 

JS example : 



    var o = { 

        aProperty : "value", 

        anotherProperty : [ "element 1", "element 2" ] } ; 

    alert(o.anotherProperty[1]) ; // "element 2" 



So I have created a class Object : 



<?php 

    class 
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