PHP Single Variabel $ and Double $$
Broadly speaking, all of these are variables that only differ this variable in the variable that has been previously defined as an example as follows$name = 'Gatot';
Ouputnya = Gatot
Whereas for $$ it will have different results
$$name = 'Sableng';
The output obtained by the variable Gatot = Sableng
That's how short it is in this video, for example ...
Hopefully it can be useful ...