➤ The scope of a variable is the part of the script in which the variable can be referenced or used. • A variable declared outside a function has a

global scope

. • A variable declared within a function has a

local scope

, and can only be accessed within that function. For instance:

// global scope
$number = 10;
function print_num() { 
	echo "the number is: $number ";
}
print_num(); // outputs:  Undefined variable $number
// the $number variable has a global scope, and is not accessible within the print_num() function


function task() {
  $name = "Mads"; // local scope
  echo "Variable name inside function is: $name";
  // outputs:  Variable name inside function is: Mads
}
task();
// using $name outside the function will generate an error
echo "Variable name outside function is: $name";
// Undefined variable $name