How to pass array names to function parameters ?

**Scott** · Apr 15 '06, 04:05 PM

Re: How to pass array names to function parameters ?

On Sat, 2006-04-15 at 12:26 +0000, tony@tony.com wrote:[color=blue]
> i'm trying to itterate through an array that contains the names of the
> global arrays
>
> eg:
>
> $myarray = array("\$_GET", "\$_SERVER" ); and so on
>
> The problem Im having is calling a function with
>
> myfunction($mya rray[0]);
>
> doesnt seem to pass the array name in a manner I can then use.
>
> I'm sure I'm missing something simple here can anyonehelp please ?
>
> tony[/color]

That should pass the name of the global array. You could also use single
quotes and drop the escape character:

$myarray = array('$_GET, '$_SERVER');

Are you sure the problem isn't in your function? What are you doing
with the name once your function receives it?

Scott

**damirz@gmail.com** · Apr 15 '06, 04:35 PM

Re: How to pass array names to function parameters ?

Actually, you cannot use superglobal arrays as variable variables:
[color=blue]
>From PHP manual:[/color]

PHP: Predefined Variables - Manual

http://www.php.net/manual/en/language.variables.predefined.php

Predefined Variables

"Variable variables: Superglobals cannot be used as variable variables
inside functions or class methods."

**tony@tony.com** · Apr 15 '06, 08:55 PM

Re: How to pass array names to function parameters ?

In article <1145117876.799 548.249800@v46g 2000cwv.googleg roups.com>,
damirz@gmail.co m says...[color=blue]
> Actually, you cannot use superglobal arrays as variable variables:
>[color=green]
> >From PHP manual:[/color]
> http://www.php.net/manual/en/languag...predefined.php
>
> "Variable variables: Superglobals cannot be used as variable variables
> inside functions or class methods."
>
>[/color]

Oh bugger.

Thanks for that.

I was just trying to get all the superglobals to echo out to the browser
without having to code every one seperately...

something like:

function showthisarray($ nextGlobal) {
echo($nextGloba l . "\n"); // debug line
foreach($nextGl obal as $k => $v ) {
echo($k . " = " . $v . "\n");
}
}

The idea being to just pass the array names in sequence or as selected.

The function does get the name of the relevant array as the first echo
prints it ok eg . $_GET or whatever as is passed into $nextGlobal

But the foreach() function just generates a bad parameter error.

I guess it will have to be the long winded solution.

tony

**Sidonath** · Apr 15 '06, 09:15 PM

Re: How to pass array names to function parameters ?

But you still can try with $HTTP_*_VARS :)

// $nextGlobal = {"GET", "POST", ...}

function showthisarray($ nextGlobal) {
echo($nextGloba l . "\n"); // debug line
foreach(${'HTTP _' . $nextGlobal . '_VARS'} as $k => $v ) {
echo($k . " = " . $v . "\n");
}
}

I didn't write much PHP lately, so sorry if there is some syntax (or
any other) error here.

**tony@tony.com** · Apr 16 '06, 08:25 AM

Re: How to pass array names to function parameters ?

In article <1145134642.131 789.187380@j33g 2000cwa.googleg roups.com>,
damirz@gmail.co m says...[color=blue]
> But you still can try with $HTTP_*_VARS :)
>
> // $nextGlobal = {"GET", "POST", ...}
>
> function showthisarray($ nextGlobal) {
> echo($nextGloba l . "\n"); // debug line
> foreach(${'HTTP _' . $nextGlobal . '_VARS'} as $k => $v ) {
> echo($k . " = " . $v . "\n");
> }
> }
>
> I didn't write much PHP lately, so sorry if there is some syntax (or
> any other) error here.
>
>[/color]

Worth a try but it produces the same result. It seems you can't pass the
array name in a string at all from what I can see.

tony

**Sidonath** · Apr 16 '06, 12:25 PM

Re: How to pass array names to function parameters ?

I knew that I forgot something :/

$HTTP_*_VARS arrays are not superglobal. Hence you need to specify in
function that you're using global arrays or access them with $GLOBALS
array

Here's a bit modified example that should work:

------------------------

// custom global array
$myArray = array("some", "elements") ;

// array with names of global arrays you want to access
$globalArrayNam es = array("HTTP_GET _VARS", "HTTP_POST_VARS ",
"myArray");

// parameter is global array name
function showThisArray($ globalArrayName ) {
echo($globalArr ayName . "\n"); // debug line
foreach($GLOBAL S[$globalArrayNam e] as $k => $v ) {
echo($k . " = " . $v . "\n");
}
}

showThisArray($ globalArrayName s[0]);
showThisArray($ globalArrayName s[1]);
showThisArray($ globalArrayName s[2]);

------------------------

Hope this helps

**tony@tony.com** · Apr 17 '06, 09:45 PM

Re: How to pass array names to function parameters ?

In article <1145189729.880 217.112930@i40g 2000cwc.googleg roups.com>,
damirz@gmail.co m says...[color=blue]
> I knew that I forgot something :/
>[/color]

Nice one. Modified slightly & tested - it works fine - as below.
I added SERVER just to be sure of some output from a Sglobal
So much nicer than having to do each one at a time ;-)

<?php
// custom global array
$myArray = array("some", "elements") ;

// array with names of global arrays you want to access
$globalArrayNam es = array("HTTP_SER VER_VARS", "HTTP_POST_VARS ",
"myArray");

// parameter is global array name
function showThisArray($ globalArrayName ) {
echo(" " . "[ " . $globalArrayNam e . " ] ");
foreach($GLOBAL S[$globalArrayNam e] as $k => $v ) {
echo($k . " = " . $v . " ");
}
}

showThisArray($ globalArrayName s[0]);
showThisArray($ globalArrayName s[1]);
showThisArray($ globalArrayName s[2]);
?>

tony

**Ken Robinson** · Apr 17 '06, 10:05 PM

Re: How to pass array names to function parameters ?

tony@tony.com wrote:[color=blue]
> In article <1145189729.880 217.112930@i40g 2000cwc.googleg roups.com>,
> damirz@gmail.co m says...[color=green]
> > I knew that I forgot something :/
> >[/color]
>
> Nice one. Modified slightly & tested - it works fine - as below.
> I added SERVER just to be sure of some output from a Sglobal
> So much nicer than having to do each one at a time ;-)
>[/color]

Here's another way of doing this.

<?php
// custom global array
$myArray = array("some", "elements") ;

// array with names of global arrays you want to access
$globalArrayNam es =
array(array('$_ SERVER',$_SERVE R),array('$_POS T',$_POST),
array("myArray" ,$myArray));

// parameter is global array name
function showThisArray($ globalArrayName ) {
echo(" " . "[ " . $globalArrayNam e[0] . " ] ");
echo '<pre>' . print_r($global ArrayName[1],true) . '</pre>';
}

showThisArray($ globalArrayName s[0]);
showThisArray($ globalArrayName s[1]);
showThisArray($ globalArrayName s[2]);
?>

Ken

**tony@tony.com** · Apr 18 '06, 08:35 AM

Re: How to pass array names to function parameters ?

In article <1145310837.226 085.226960@g10g 2000cwb.googleg roups.com>,
kenrbnsn@gmail. com says...
[color=blue]
> Here's another way of doing this.
>
> <?php
> // custom global array
> $myArray = array("some", "elements") ;
>
> // array with names of global arrays you want to access
> $globalArrayNam es =
> array(array('$_ SERVER',$_SERVE R),array('$_POS T',$_POST),
> array("myArray" ,$myArray));
>
> // parameter is global array name
> function showThisArray($ globalArrayName ) {
> echo(" " . "[ " . $globalArrayNam e[0] . " ] ");
> echo '<pre>' . print_r($global ArrayName[1],true) . '</pre>';
> }
>
> showThisArray($ globalArrayName s[0]);
> showThisArray($ globalArrayName s[1]);
> showThisArray($ globalArrayName s[2]);
> ?>
>
>
> Ken
>
>[/color]

And there was me thinking it couldnt be done ... ;-)
Now we have two ways.

Correct me if I'm wrong though Ken but doesnt this method pass the actual
array rather than just the name?

I'm not sure because I'm not able to work out what this is doing exactly
(I'm new to PHP as you may have gathered)

tony

**milahu** · Apr 18 '06, 01:25 PM

Re: How to pass array names to function parameters ?

tony@tony.com schrieb:
[color=blue]
> i'm trying to itterate through an array that contains the names of the
> global arrays
>
> eg:
>
> $myarray = array("\$_GET", "\$_SERVER" ); and so on
>
> The problem Im having is calling a function with
>
> myfunction($mya rray[0]);
>
> doesnt seem to pass the array name in a manner I can then use.
>
> I'm sure I'm missing something simple here can anyonehelp please ?
>
> tony[/color]

Try this one:

$arrs = array('_GET', '_POST');
foreach($arrs as $arrnam)
print_r($$arrna m);

How to pass array names to function parameters ?

How to pass array names to function parameters ?

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