[explain] variable variables

[nagasea]

can someone explain me how to use variable variables ?
I read it many times at :
http://us4.php.net/manual/en/language.variables.variable.php

but still dont know how to implement this things

I had more than 1 variable, how to display it without echo the variable one by one. (maybe using "while" / "for")
Otherwise I should make like
echo $result1;
echo $result2;
echo $result3;
echo $result4;
echo $result5;
echo $result6;
If I had more than 1000, that's really hurt

[Mordecai]

Look at the examples on php.net. First, they start off with: $a = "hello";, and then they have $$a = "world";.
As you can see, there are two $ signs, which denotes that this is a variable variable. $$a simply means "a variable named (the value of $a)". If $a is "hello," then $$a is $hello. If $$a = "world," then we can assume $hello = "world." $$a is the same thing as ${$a}, it's just a shorter form, and it's not as good of a practice.
When you echo "$a $hello," you echo "hello world"!
This is a bit more descriptive than the manual entry.

Also, make sure you read the note about arrays and solving ambiguity:

In order to use variable variables with arrays, you have to resolve an ambiguity problem. That is, if you write $$a[1] then the parser needs to know if you meant to use $a[1] as a variable, or if you wanted $$a as the variable and then the [1] index from that variable. The syntax for resolving this ambiguity is: ${$a[1]} for the first case and ${$a}[1] for the second.

[nagasea]

Mmmm.. how about if my code is like this :

$howmany = 100;
$counter = 1;
while ($counter <= $howmany) {
// ***
$address_comb = "address-".$counter;
$address = $_POST[$address_comb];
$varname = "address".$counter;
$$varname = $address;
// ***
}

And now I want to echo $address1,$address2,...,$address100 with LOOP (While/For)
I think the best way is using variable variables but I still cant figure it out how to use it.

[barand]

Are you really sure you need variable variables? I suspect an array is what you need.

[nagasea]

can someone tell me how to do this thing with array, please.
maybe using simple code so I can figure it out the rest

[kevinsequeira]

<?php
$howmany = 100;
$counter = 1;
while ($counter <= $howmany) {
		$var = "address".$counter;
		echo $var." is ".$_POST['$var']."<BR>";
} 
?>

reg
kevin

[nagasea]

my question is how to make $var into $var1, $var2, etc..
so I want to make each $var result in the while (loop) into variable

[kevinsequeira]

i dont understand what it is that u need, perhaps u can explain it with an actual example and by posting ure form code snippet

reg
kevin

[nagasea]

my code is so big, so can I email to you ?

[kevinsequeira]

well u could e-mail it, but just explain what it is that you are trying to do. i assume you want to get some values form a from or something ??

reg
kevin