function and variable names

[micha]

suppose i have the following code

function some_function($ data)
{
// do something with data
}

$test = 'some_value';

some_function($ test);

is there any way to access the var name '$test' from within the
function, i. e. can $data find out that $test is it's "parent"?
tia, micha

[Virgil Green]

Re: function and variable names

micha wrote:[color=blue]
> suppose i have the following code
>
> function some_function($ data)
> {
> // do something with data
> }
>
> $test = 'some_value';
>
> some_function($ test);
>
> is there any way to access the var name '$test' from within the
> function, i. e. can $data find out that $test is it's "parent"?
> tia, micha[/color]

Don't think so... but why would you want to know that?

--
Virgil

[micha]

Re: function and variable names


Virgil Green wrote:[color=blue]
> micha wrote:[color=green]
> > suppose i have the following code
> >
> > function some_function($ data)
> > {
> > // do something with data
> > }
> >
> > $test = 'some_value';
> >
> > some_function($ test);
> >
> > is there any way to access the var name '$test' from within the
> > function, i. e. can $data find out that $test is it's "parent"?
> > tia, micha[/color]
>
> Don't think so... but why would you want to know that?
>
> --[/color]

well, i'm trying to write a function that automatically validates
arrays, i.e. $_POST, so i would need the original var name to report
back errors.

micha[color=blue]
> Virgil[/color]

[Virgil Green]

Re: function and variable names

micha wrote:[color=blue]
> Virgil Green wrote:[color=green]
>> micha wrote:[color=darkred]
>>> suppose i have the following code
>>>
>>> function some_function($ data)
>>> {
>>> // do something with data
>>> }
>>>
>>> $test = 'some_value';
>>>
>>> some_function($ test);
>>>
>>> is there any way to access the var name '$test' from within the
>>> function, i. e. can $data find out that $test is it's "parent"?
>>> tia, micha[/color]
>>
>> Don't think so... but why would you want to know that?
>>
>> --[/color]
>
> well, i'm trying to write a function that automatically validates
> arrays, i.e. $_POST, so i would need the original var name to report
> back errors.
>
> micha[color=green]
>> Virgil[/color][/color]

Then I'd suggest that your function have a second parameter that allows the
caller to pass in a string of identifying data that you use in the "report"
your function provides, or I'd have the function return the error messages
and allow the caller to format their own "report" of the errors since the
caller is aware of what variable was being validated.

--
Virgil

[Tony Marston]

Re: function and variable names


"micha" <chotiwallah@we b.de> wrote in message
news:1106814330 .870093.279030@ f14g2000cwb.goo glegroups.com.. .[color=blue]
>
> Virgil Green wrote:[color=green]
>> micha wrote:[color=darkred]
>> > suppose i have the following code
>> >
>> > function some_function($ data)
>> > {
>> > // do something with data
>> > }
>> >
>> > $test = 'some_value';
>> >
>> > some_function($ test);
>> >
>> > is there any way to access the var name '$test' from within the
>> > function, i. e. can $data find out that $test is it's "parent"?
>> > tia, micha[/color]
>>
>> Don't think so... but why would you want to know that?
>>
>> --[/color]
>
> well, i'm trying to write a function that automatically validates
> arrays, i.e. $_POST, so i would need the original var name to report
> back errors.[/color]

As the $_POST array is an associative array of name=value pairs then why
don't you do what I do and pass BOTH name and value to the validating
function.

--
Tony Marston

http://www.tonymarston.net

[Virgil Green]

Re: function and variable names

Tony Marston wrote:[color=blue]
> "micha" <chotiwallah@we b.de> wrote in message
> news:1106814330 .870093.279030@ f14g2000cwb.goo glegroups.com.. .[color=green]
>>
>> Virgil Green wrote:[color=darkred]
>>> micha wrote:
>>>> suppose i have the following code
>>>>
>>>> function some_function($ data)
>>>> {
>>>> // do something with data
>>>> }
>>>>
>>>> $test = 'some_value';
>>>>
>>>> some_function($ test);
>>>>
>>>> is there any way to access the var name '$test' from within the
>>>> function, i. e. can $data find out that $test is it's "parent"?
>>>> tia, micha
>>>
>>> Don't think so... but why would you want to know that?
>>>
>>> --[/color]
>>
>> well, i'm trying to write a function that automatically validates
>> arrays, i.e. $_POST, so i would need the original var name to report
>> back errors.[/color]
>
> As the $_POST array is an associative array of name=value pairs then
> why don't you do what I do and pass BOTH name and value to the
> validating function.[/color]

I believe he wants the name of the array... "$_POST" in this case.

--
Virgil

[anima]

Re: function and variable names

If you use `global $test;` as a line inside the function it will allow
that function access to the var outside the function. if you did this
after you assigned it's passed-on variable to a different name, you
could compare the two non ?

[micha]

Re: function and variable names

yes, how stupid of me.
of course i can just use the names of the associative array.
sorry to have bothered everybody

micha

[Virgil Green]

Re: function and variable names

micha wrote:[color=blue]
> yes, how stupid of me.
> of course i can just use the names of the associative array.
> sorry to have bothered everybody
>
> micha[/color]

I fail to see how that will accomplish your original goal. Or was the
original problem mis-stated (duplicated below)?
[color=blue]
> micha wrote:[color=green]
>> suppose i have the following code
>>
>> function some_function($ data)
>> {
>> // do something with data
>> }
>>
>> $test = 'some_value';
>>
>> some_function($ test);
>>
>> is there any way to access the var name '$test' from within the
>> function, i. e. can $data find out that $test is it's "parent"?[/color][/color]


--
Virgil