Getting a variable, which is stored in another one 3

[lukelukeluke]

hi,
I have a question about php variables:
Here are my 3 variables:

$var1 = "hello World";
$var2 = "Hello Earth";
$var3 = "var1";

Now, I would like to output "Hello World" using var3,
and also "Hello Earth" when changing $var3 = "var2";

Someone knows how this is possible?

Webmaster of

http://www.lookass.ch,

knowledgebase for IT knowledge.

 

[ChrisHirst]

$var3 = $var1;



Chris.

Indifference will be the downfall of mankind, but who cares?

http://www.candsdesign.co.uk

A website that proves the cobblers kids adage.

http://www.cram-system.com

Nightclub counting systems

So long, and thanks for all the fish.

 

[lukelukeluke]

hi chris. Thanks for your fast answer, but thats not what i wanted...
i have these:

$var1 = "hello World";
$var2 = "Hello Earth";
$var3 = "var1";

now, i want to do something with $var3 (but not changing its content) so it gives me the content of var1. my $var3 is set to "var1".
I tryed to see google for this and saw its maybe called pointer. But i didnt see any solution or tutorial for these.

Webmaster of

http://www.lookass.ch,

knowledgebase for IT knowledge.

 

[ChrisHirst]

referencing rather than pointers then,

$var3 = &$var1;

Chris.

Indifference will be the downfall of mankind, but who cares?

http://www.candsdesign.co.uk

A website that proves the cobblers kids adage.

http://www.cram-system.com

Nightclub counting systems

So long, and thanks for all the fish.

 

[Vragabond]

Isn't it:

$var1 = "hello World";
$var2 = "Hello Earth";
$var3 = "var1";

echo $$var3;

It's been a while since I did anything with PHP.

 

[flubbard]

If this helps, I have done something like this in the past.

$var1 = "hello World";
$var2 = "Hello Earth";
$var3 = 1;

echo $var{$var3};

Likewise, I think that you could do (in your example) ${$var3} to echo "hello World"

You can always search for dynamic variables

 

[DRJ478]

Vragabond has given IMO the best answer.
A variable-variable. A double dollar sign accesses the value of the named variable.

# The value
$var1 = "Hello world";
# The varname
$var3 = "var1";
#output -> Hello world
# same as the code >echo $var1;
echo $$var3;