How to get a variable name as a string in PHP?

itemprop="text">

Say i have this PHP
code:

$FooBar = "a
            string";

i
then need a function like
this:

print_var_name($FooBar);

which
prints:

FooBar

Any
Ideas how to achieve this? Is this even possible in PHP?

Answer

You could use href="http://php.net/get_defined_vars" rel="noreferrer">get_defined_vars()
to find the name of a variable that has the same value as the one you're trying to find
the name of. Obviously this will not always work, since different variables often have
the same values, but it's the only way I can think of to do
this.

Edit: get_defined_vars() doesn't seem to
be working correctly, it returns 'var' because $var is used in the function itself.
$GLOBALS seems to work so I've changed it to
that.

function
            print_var_name($var) {
 foreach($GLOBALS as $var_name => $value)
            {
 if ($value === $var) {

 return $var_name;

            }
 }

 return
            false;
}

Edit:
to be clear, there is no good way to do this in PHP, which is probably because you
shouldn't have to do it. There are probably better ways of doing what you're trying to
do.