[PHP-BUG] Req #51532 [NEW]: Cannot override SplFileObject::fscanf()

[email protected] ("mi dot olszewski at gmail dot com") Sun, 11 Apr 2010 15:14:24 +0200 (CEST)
Newsgroups php.bugs
Message-ID <[email protected]>
From:             
Operating system: MS Windows Vista
PHP version:      5.3.2
Package:          SPL related
Bug Type:         Feature/Change Request
Bug description:Cannot override SplFileObject::fscanf()

Description:
------------
There seems to be a problem with overriding SPLFileObject::fscanf() method.
I'm not sure whether this is PHP language-related issue or issue with
method definition in SPLFileObject.

When you look at 'splfileobject.inc' file from PHP 5.3.2 source code you
can see that method definition is:

function fscanf($format /* , ... */)

so it seems logical to assume only one parameter in overridden method.

However, using Reflection API to get fscanf parameters:

$class = new ReflectionClass('SPLFileObject');
$method = $class->getMethod('fscanf');
$params = $method->getParameters();
foreach ($params as $p)
{
 echo $p->getName() . PHP_EOL;
}

Prints out:

format
...

Yes - '...' is literally printed out.

So it leaves me puzzled - either I am missing something very obvious or
fscanf is handling variable-length method arguments in some non-standard
way (like using func_get_args()).

All in all - overriding fscanf in a way like in specified example test
script results in strict standards notice.

Test script:
---------------
class SomeOtherFileObject extends SPLFileObject {
  function fscanf($format) {
    echo 'my little dummy';
  }
}

$test = new SomeOtherFileObject('test.php');
$test->fscanf('%s');

Expected result:
----------------
The fscanf method is overridden without PHP notices, warnings and errors.

Actual result:
--------------
Strict standards: Declaration of SomeOtherFileObject::fscanf() should be
compatible with that of SplFileObject::fscanf()

-- 
Edit bug report at http://bugs.php.net/bug.php?id=51532&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=51532&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=51532&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=51532&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=51532&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51532&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=51532&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=51532&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=51532&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=51532&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=51532&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=51532&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=51532&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=51532&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=51532&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51532&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51532&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=51532&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=51532&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=51532&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=51532&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=51532&r=mysqlcfg