Get name of passed variable in a function

[Adam]

I've cobbled a sort of global "debug" routine by using this function:

function debug($str, $strname) {
global $debugYN;
if ($debugYN) {
echo "<br>[Debug (<span
style=\"color:r ed\">$$strname </span>) : <strong>$str</strong>]<br>";
}
}

This function gets included (usually in a header) and then called by
setting $debugYN = 1 wherever I want to start viewing variable info -
calling the function with:

debug($foo, "foo");

I'm having to pass two values - the value of the variable AND it's
name. Is there a way of extracting the NAME of the variable ("foo" in
this case) without having to pass it?

Adam.

[Andy Hassall]

Re: Get name of passed variable in a function

On Tue, 04 Oct 2005 09:14:21 +1300, Adam <anon@nowhere.c om> wrote:
[color=blue]
>function debug($str, $strname) {
>
>debug($foo, "foo");
>
>I'm having to pass two values - the value of the variable AND it's
>name. Is there a way of extracting the NAME of the variable ("foo" in
>this case) without having to pass it?[/color]

In short, no.
--
Andy Hassall :: andy@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[Ewoud Dronkert]

Re: Get name of passed variable in a function

Andy Hassall wrote:[color=blue]
> In short, no.[/color]

Yes, http://php.net/debug-backtrace

--
E. Dronkert

[Andy Hassall]

Re: Get name of passed variable in a function

On Mon, 03 Oct 2005 22:29:48 +0200, Ewoud Dronkert
<firstname@last name.net.invali d> wrote:
[color=blue]
>Andy Hassall wrote:[color=green]
>> In short, no.[/color]
>
>Yes, http://php.net/debug-backtrace[/color]

No,

<pre>
<?php
function debug($var) {
print_r(debug_b acktrace());
}

$foo = 10;
debug($foo);

?>
</pre>

Output:

Array
(
[0] => Array
(
[file] => /home/andyh/public_html/test.php
[line] => 8
[function] => debug
[args] => Array
(
[0] => 10
)

)

)

If you can find "foo" in the above then it would do what the OP requested:
[color=blue][color=green]
>>I'm having to pass two values - the value of the variable AND it's
>>name. Is there a way of extracting the NAME of the variable ("foo" in
>>this case) without having to pass it?[/color][/color]
--
Andy Hassall :: andy@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[Chung Leong]

Re: Get name of passed variable in a function

See the following thread:

http://groups.google.com/group/comp.lang.php/browse_frm/thread/5055003f44ae6ee4/35697d72cf31b316

[Ewoud Dronkert]

Re: Get name of passed variable in a function

Andy Hassall wrote:[color=blue]
> On Mon, 03 Oct 2005 22:29:48 +0200, I wrote:[color=green]
>> Yes, http://php.net/debug-backtrace[/color]
>
> No,[/color]

Sorry, I remembered the discussion Chung linked and skimmed over the
debug-backtrace manual page, saw the 'args' key and thought that was it.
It wasn't.

--
E. Dronkert

[Adam]

Re: Get name of passed variable in a function

On 3 Oct 2005 22:32:04 -0700, Chung Leong wrote:
[color=blue]
>See the following thread:
>http://groups.google.com/group/comp....697d72cf31b316[/color]

Chung - thank you for that! I had to do the array_shift tweak as I
tend to use include files.

For the benefit of readers here, I've pasted your code (with my tweak
and thanks):

function bobo_the_clown( $b) {
$bt = debug_backtrace ();
extract(array_s hift($bt));
$lines = file($file);
$code = implode('', array_slice($li nes, $line - 1));
preg_match('/\bbobo_the_clow n\s*\(\s*(\S*?) \s*\)/i', $code,
$matches);
return @$matches[1] . " : " . $b;
}

$a = "Hello";
echo bobo_the_clown( $a);

Now, if only I could understand how it works .. LOL. Still so much to
learn!

Adam.

[R. Rajesh Jeba Anbiah]

Re: Get name of passed variable in a function

Adam wrote:[color=blue]
> On 3 Oct 2005 22:32:04 -0700, Chung Leong wrote:
>[color=green]
> >See the following thread:
> >http://groups.google.com/group/comp....697d72cf31b316[/color]
>
> Chung - thank you for that! I had to do the array_shift tweak as I
> tend to use include files.[/color]
<snip>

I wonder the use of this. Probably you're profiling? If so, better
not reinventing the wheels, there are bunch of PHP core accessing
packages like <http://pecl.php.net/packages.php?ca tpid=25&catname =PHP>

--
<?php echo 'Just another PHP saint'; ?>
Email: rrjanbiah-at-Y!com Blog: http://rajeshanbiah.blogspot.com/