What Is The Difference Between $message And $$message?

1.	What Is The Difference Between $message And $$message?
Answer» $message is a simple variable WHEREAS $$message is a variable's variable,which MEANS VALUE of the variable. Example: $user = 'bob' is EQUIVALENT to $message = 'user'; $$message = 'bob'; $message is a simple variable whereas $$message is a variable's variable,which means value of the variable. Example: $user = 'bob' is equivalent to $message = 'user'; $$message = 'bob';

Answer»

$message is a simple variable WHEREAS $$message is a variable's variable,which MEANS
VALUE of the variable. Example:
$user = 'bob'

$message = 'user';
$$message = 'bob';

$message is a simple variable whereas $$message is a variable's variable,which means
value of the variable. Example:
$user = 'bob'

is equivalent to

$message = 'user';
$$message = 'bob';

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