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Bug #18125 Cannot use :: operator when defining child classes
Submitted: 2002-07-02 23:41 UTC Modified: 2003-06-01 12:31 UTC
Votes:5
Avg. Score:4.2 ± 1.0
Reproduced:3 of 3 (100.0%)
Same Version:2 (66.7%)
Same OS:2 (66.7%)
From: optikSmoke at subdimension dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 5.0.0-dev OS:
Private report: No CVE-ID: None
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From: optikSmoke at subdimension dot com
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 [2002-07-02 23:41 UTC] optikSmoke at subdimension dot com 
Essentially, I have run into this problem: I am unable to   
use the '::' operator to define a class within a namespace   
or inherit from a class within another namespace (I am   
using 4.3.0-alpha2).  
  
Example:  
  
<?  
class Boo {  
 class Scream {  
 }  
}  
  
class Boo::Ahh extends Boo::Scream {  
}  
?>  
  
This will generate a "expecting ''{'' on line 7" parser  
error (the "class Boo::Ahh ....." line). Similarly, "class 
Biff extends Boo::Scream {}" and "class Biff::Ahh extends 
Boo {}" (or any other definitions in these forms) will 
generate the same error. It appears to me that any class 
definitions that use the :: operator and the extends 
clause will generate this error. 
 
I have found this to be a problem that is particularly 
annoying, as I am developing a set of library classes that 
reside within specific namespaces, in seperate files. For 
example, I would like to be able to create a namespace 
"Foo" containing class "Bar" and its child class "Biff", 
both in seperate files so scripts not utililizing "Biff" 
need not load it.

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 [2002-07-04 01:14 UTC] bob at bravenet dot com 
The problem exists in the internal handling of :: within classnames. Here is another example of the same problem in a different context. In this case...when using the classname within a variable, PHP isnt able to find the class.

<?

class App {
    function CreateObject($classname) {
        return new $classname;
    }
}

class App::Client {
    function __construct()
    {
        echo 'In App::Client constructor';
    }
}

class Client {
    function __construct()
    {
        echo 'In Client constructor';
    }
}

App::CreateObject('Client');
App::CreateObject('App::Client');

?>
 [2003-04-18 17:39 UTC] thekid at thekid dot de 
As namespaces have been rewritten entierly since this bug was reported, I think what's still left of this is:

namespace foo {
  class bar { }
}

$name= 'foo::bar';
$o= new $name();

Results in:
  Fatal error: Class 'foo::bar' not found

eval('$o= new '.$name.'();'); is ugly but works.
 [2003-06-01 12:31 UTC] helly@php.net 
PHP5 doesn't support nested classes.
 
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