$x = 5; $type = gettype($x); echo $type; //output: integer
$x = "Hello"; $type = gettype($x); echo $type; //output: string
$x = true; $type = gettype($x); echo $type; //output: booleanThis example shows that the variable "x" is a boolean. As for determining the package library, the "getType" method is a built-in function in PHP and does not belong to any specific package or library.