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Date: Thu, 22 May 2008 18:23:03 +0300
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Subject: Re: [PHP-DEV] Getting Default Values via reflection.
From: sv_forums@fmethod.com ("Stan Vassilev | FM")


Hi,

Please notice that I said "followed by required ones".

function foo($a = null, $b) {}

The above definition is allowed and the compiler won't complain, but 
actually that "= null" is completely lost, including in Reflection.

Regards,
Stan Vassilev


> 2008/5/22 Stan Vassilev | FM <sv_forums@fmethod.com>:
>>
>> Hi,
>>
>> Actually PHP ignores default values on parameters followed by required 
>> ones.
>> You can't fetch the default value even via Reflection.
>> This is easily detected at compile time so I wonder why the compiler 
>> doesn't
>> warn.
>>
>> Regards,
>> Stan Vassilev
>
> I'm not sure this is what you mean, but I use the following function
> in my debugging logic.
>
> <?php
> function getArgs($s_Function, array $a_PassedParams = array()) {
>  $a_Arguments = array();
>  if ('' !== $s_Function) {
>    $rf_This = new ReflectionFunction($s_Function);
>    foreach($rf_This->getParameters() as $i_Param => $rp_Param) {
>      $a_Arguments[$rp_Param->getName()] = $i_Param <
> count($a_PassedParams) ? $a_PassedParams[$i_Param] :
> $rp_Param->getDefaultValue() . ' (Default)';
>    }
>  }
>  return $a_Arguments;
> }
>
> function foo($required, $optional = 'snafu', $also_optional = 'sins') {
>  print_r(getArgss(__FUNCTION__, func_get_args()));
> }
>
> foo('fred');
> foo('bob', 'jim');
>
> outputs ...
>
> Array
> (
>    [required] => fred
>    [optional] => snafu (Default)
>    [also_optional] => sins (Default)
> )
> Array
> (
>    [required] => bob
>    [optional] => jim
>    [also_optional] => sins (Default)
> )
>
> -- 
> -----
> Richard Quadling
> Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
> "Standing on the shoulders of some very clever giants!"
>
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