Getting Default Values via reflection.
| From: | Richard Quadling | Date: | Thu, 22 May 2008 11:58:19 +0000 |
| Subject: | Getting Default Values via reflection. | ||
| Groups: | php.internals | ||
| Request: | Send a blank email to internals+get-37800@lists.php.net to get a copy of this message | ||
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!"