Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
""Boyd, Todd M."" wrote in message news:33bde0b2c17eef46acbe00537cf2a19003d07...@exchcluster.ccis.edu... > -Original Message- > From: Daevid Vincent [mailto:dae...@daevid.com] > Sent: Friday, February 06, 2009 2:26 PM > To: php-general@lists.php.net > Subject: Re: [PHP] How can I use a function's default arguments but > change one of the end ones in the list? > > On Fri, 2009-02-06 at 14:10 +1300, German Geek wrote: > > > I've thought about this problem before but couldn't think of a > > solution either. > > > Well, I guess I *did* think of a solution, it just happens that PHP > doesn't do "the logical thing"(tm) > > ;-) > > I would hope the PHP developers would implement this idea for a future > version. The concept is simple, just specify which parameters in the > function call you want to change and leave the others as their default. > > I've added it here: http://bugs.php.net/bug.php?id=47331 with comments > about similar/related bugs. > > Feel free to vote on this. I think it's a necessary addition to the > language and often a source of frustration for me in large projects > especially where functions get older and older and more parameters are > needed to maintain backwards compatibility yet get new functionality > too. Just tell 'em that .NET already has it; that'll light a fire under them! :D C# can do function calls like: FunctionName(VariableName:=Value); I wholeheartedly prefer PHP to .NET for most things... but you've got to admit--that's a pretty slick feature. Me likey. // Todd I don't remember what it was I was using, but I remember a lang that allowed func(,,,change,,,change) where all the empty comas just went to default. *shrug* -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
> -Original Message- > From: Daevid Vincent [mailto:dae...@daevid.com] > Sent: Friday, February 06, 2009 2:26 PM > To: php-general@lists.php.net > Subject: Re: [PHP] How can I use a function's default arguments but > change one of the end ones in the list? > > On Fri, 2009-02-06 at 14:10 +1300, German Geek wrote: > > > I've thought about this problem before but couldn't think of a > > solution either. > > > Well, I guess I *did* think of a solution, it just happens that PHP > doesn't do "the logical thing"(tm) > > ;-) > > I would hope the PHP developers would implement this idea for a future > version. The concept is simple, just specify which parameters in the > function call you want to change and leave the others as their default. > > I've added it here: http://bugs.php.net/bug.php?id=47331 with comments > about similar/related bugs. > > Feel free to vote on this. I think it's a necessary addition to the > language and often a source of frustration for me in large projects > especially where functions get older and older and more parameters are > needed to maintain backwards compatibility yet get new functionality > too. Just tell 'em that .NET already has it; that'll light a fire under them! :D C# can do function calls like: FunctionName(VariableName:=Value); I wholeheartedly prefer PHP to .NET for most things... but you've got to admit--that's a pretty slick feature. Me likey. // Todd -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
On Fri, 2009-02-06 at 14:10 +1300, German Geek wrote: > I've thought about this problem before but couldn't think of a > solution either. Well, I guess I *did* think of a solution, it just happens that PHP doesn't do "the logical thing"(tm) ;-) I would hope the PHP developers would implement this idea for a future version. The concept is simple, just specify which parameters in the function call you want to change and leave the others as their default. I've added it here: http://bugs.php.net/bug.php?id=47331 with comments about similar/related bugs. Feel free to vote on this. I think it's a necessary addition to the language and often a source of frustration for me in large projects especially where functions get older and older and more parameters are needed to maintain backwards compatibility yet get new functionality too.
Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
2009/2/6 Daevid Vincent
> Is there a way to use the default values of a function without
> specifying every single one until the parameter you want to modify in
> PHP5 ?
>
> I don't see it here, but feel this would be very useful indeed.
> http://www.php.net/manual/en/functions.arguments.php
>
> So given a function that takes seven parameters, I want to change one of
> them and leave the other defaults alone...
>
> function SQL_QUERY($sql, $parameters = null, $showSQL = false,
> $showErrors = true, $execute = true, $noHTML = false, $profile = 0)
> {
>var_dump($sql, $parameters, $showSQL, $showErrors, $execute,
> $noHTML,
> $profile);
> }
> ?>
>
>
>
>
>
>
> true); ?>
>
>
>
> $execute=false); ?>
>
>
> outputs:
> ---
> string(31) "SELECT * FROM foo WHERE bar = ?"
> NULL
> bool(false)
> bool(true)
> bool(true)
> bool(false)
> int(0)
> ---
> string(31) "SELECT * FROM foo WHERE bar = ?"
> array(1) { [0]=> string(4) "beep" }
> bool(true)
> bool(true)
> bool(true)
> bool(false)
> int(0)
> ---
> string(31) "SELECT * FROM foo WHERE bar = ?"
> array(1) { [0]=> string(4) "beep" }
> bool(false)
> bool(true)
> bool(true) <-- I would have expected this one to be bool(false)
> bool(false)
> int(0)
>
> The above function call doesn't error out on me, it just seems it
> doesn't do anything either :-\
>
> So it seems I have to do this verboseness (AND know what the default
> values are to begin with too):
>
> SQL_QUERY('SELECT * FROM foo WHERE bar = ?', array('beep'), false, true,
> false, false);
>
> Just to change one default parameter?!? :-(
>
>
>
You could probably create a class and break up the functionality of that
function, for somebody reading your code would be hard understanding all
that parameters, maybe even for you after a while.
--
Alpar Torok
Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
On Thu, Feb 5, 2009 at 20:10, German Geek wrote:
> I've thought about this problem before but couldn't think of a solution
> either. How does func_get_args() solve this? You could make a wrapper
> function without that.
It's all in how it's used. Ironically, I don't remember saying
that you couldn't make a wrapper function without it, or that it was
required to make a wrapper. Thanks for clarifying that for everyone
just in case. ;-P
> How would u (php) know which parameter u mean in a particular case?
You don't have to. You can send NULL or empty strings for that
matter, and use the parameter position in func_get_args() that way.
Or using hierarchy and preference:
Though inelegant, it works.
What would probably be better, though, would be to write the
wrapper as I mentioned, but have it accept a single parameter as an
array, like so:
$v) {
$$k = $v;
}
// Call original function with these values and pass through the results.
return orig_func($param_one,$param_two,$param_three,$param_four);
}
// Then use it like so:
$params = array(
'param_two' => 'Orange',
'param_four' => 543.21,
);
?>
If all orig_func() did was a simple foreach()/echo routine, it
wrapper_func() would print:
[NULL]
Orange
foo
543.21
> I think it would just be useful to have an IDE that can write out the
> default parameters on a keyboard shortcut or mouse click and then u can
> change them afterwards.
It would be nice if every programmer touching the code had the
same IDE. Unfortunately, it's just not practical.
--
daniel.br...@parasane.net || danbr...@php.net
http://www.parasane.net/ || http://www.pilotpig.net/
Unadvertised dedicated server deals, too low to print - email me to find out!
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Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
German Geek wrote: > I've thought about this problem before but couldn't think of a solution > either. How does func_get_args() solve this? You could make a wrapper > function without that. > > How would u (php) know which parameter u mean in a particular case? > > I think it would just be useful to have an IDE that can write out the > default parameters on a keyboard shortcut or mouse click and then u can > change them afterwards. > > Cheers, > Tim > > Tim-Hinnerk Heuer > > http://www.ihostnz.com > Well, using func_get_args() you can pass whatever you want and parse the args to see what was passed and assign default values if a specific arg wasn't passed. I however would probably pass an associative array to the func and parse that. -- Thanks! -Shawn http://www.spidean.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
Daevid Vincent wrote:
> Is there a way to use the default values of a function without
> specifying every single one until the parameter you want to modify in
> PHP5 ?
>
> I don't see it here, but feel this would be very useful indeed.
> http://www.php.net/manual/en/functions.arguments.php
>
> So given a function that takes seven parameters, I want to change one of
> them and leave the other defaults alone...
>
> The above function call doesn't error out on me, it just seems it
> doesn't do anything either :-\
>
> So it seems I have to do this verboseness (AND know what the default
> values are to begin with too):
>
> SQL_QUERY('SELECT * FROM foo WHERE bar = ?', array('beep'), false, true,
> false, false);
>
> Just to change one default parameter?!? :-(
>
What you are wanting to do is not possible.
Back in the day, I worked on a project that used our own variation of this type
of functionality.
We had this function that helped a little
function alternate(&$a, $b) {
return $a = ( $a ? $a : $b );
}
function query($sql, $params=array()) {
alternate($params, array());
extract($params);
alternate($parameters, null);
alternate($showSQL, false);
alternate($showErrors, true);
alternate($execute, true);
alternate($noHTML, false);
alternate($profile, 0);
# Do your thing...
}
This allowed for us to include/exclude whatever we wanted from the
it is a little long winded to get to what you are looking for ( I think )
But it worked for us.
--
Jim Lucas
"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."
Twelfth Night, Act II, Scene V
by William Shakespeare
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Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
I've thought about this problem before but couldn't think of a solution either. How does func_get_args() solve this? You could make a wrapper function without that. How would u (php) know which parameter u mean in a particular case? I think it would just be useful to have an IDE that can write out the default parameters on a keyboard shortcut or mouse click and then u can change them afterwards. Cheers, Tim Tim-Hinnerk Heuer http://www.ihostnz.com On Fri, Feb 6, 2009 at 1:56 PM, Daniel Brown wrote: > On Thu, Feb 5, 2009 at 18:50, Daevid Vincent wrote: > > Is there a way to use the default values of a function without > > specifying every single one until the parameter you want to modify in > > PHP5 ? > > Daevid, > >Check out func_get_args(): http://php.net/func_get_args > >Then you can rename your sql_query() function to real_sql_query() > and create a new sql_query() as a wrapper function with > func_get_args() in place of statically-defined variables. > > -- > > daniel.br...@parasane.net || danbr...@php.net > http://www.parasane.net/ || http://www.pilotpig.net/ > Unadvertised dedicated server deals, too low to print - email me to find > out! > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >
Re: [PHP] How can I use a function's default arguments but change one of the end ones in the list?
On Thu, Feb 5, 2009 at 18:50, Daevid Vincent wrote: > Is there a way to use the default values of a function without > specifying every single one until the parameter you want to modify in > PHP5 ? Daevid, Check out func_get_args(): http://php.net/func_get_args Then you can rename your sql_query() function to real_sql_query() and create a new sql_query() as a wrapper function with func_get_args() in place of statically-defined variables. -- daniel.br...@parasane.net || danbr...@php.net http://www.parasane.net/ || http://www.pilotpig.net/ Unadvertised dedicated server deals, too low to print - email me to find out! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] How can I use a function's default arguments but change one of the end ones in the list?
Is there a way to use the default values of a function without
specifying every single one until the parameter you want to modify in
PHP5 ?
I don't see it here, but feel this would be very useful indeed.
http://www.php.net/manual/en/functions.arguments.php
So given a function that takes seven parameters, I want to change one of
them and leave the other defaults alone...
outputs:
---
string(31) "SELECT * FROM foo WHERE bar = ?"
NULL
bool(false)
bool(true)
bool(true)
bool(false)
int(0)
---
string(31) "SELECT * FROM foo WHERE bar = ?"
array(1) { [0]=> string(4) "beep" }
bool(true)
bool(true)
bool(true)
bool(false)
int(0)
---
string(31) "SELECT * FROM foo WHERE bar = ?"
array(1) { [0]=> string(4) "beep" }
bool(false)
bool(true)
bool(true) <-- I would have expected this one to be bool(false)
bool(false)
int(0)
The above function call doesn't error out on me, it just seems it
doesn't do anything either :-\
So it seems I have to do this verboseness (AND know what the default
values are to begin with too):
SQL_QUERY('SELECT * FROM foo WHERE bar = ?', array('beep'), false, true,
false, false);
Just to change one default parameter?!? :-(
