[2010-06-25 12:50 UTC] andreas dot streichardt at globalpark dot com

Description:
------------
When defining a function alias internally in PHP, PHP_FALIAS requires an arginfo 
as the third parameter.

For example gzwrite() is internally represented as a function alias to fwrite():

PHP_FALIAS(gzwrite,             fwrite,                 NULL)

Here however the argument info is not provided. This leads to the fact that the 
reflection api can't extract the parameters of gzwrite.

Why does an FALIAS require an arginfo? Couldn't it just take the argument info 
of the alias function if the arginfo is null? The impact is that you can't 
determine the required arguments from the gzwrite function. I hacked the code 
and added the arginfo stuff and the reflection api immediatly noticed that 
gzwrite requires 2 parameters. We are doing massive static code analysis and our 
code analysis returns bogus results due to the fact that the reflection api 
can't report the real arguments of a function.

Test script:
---------------
<?php
foreach (array("gzwrite","fwrite") as $function)
{
  $refl=new ReflectionFunction($function);
  var_dump($refl->getNumberOfRequiredParameters());
  var_dump($refl->getNumberOfParameters());
}
?>

Expected result:
----------------
int(2)
int(3)
int(2)
int(3)


Actual result:
--------------
int(0)
int(0)
int(2)
int(3)