What is the difference between using echo "Hello $name"; and echo "Hello".$name; in PHP?

The difference between using echo "Hello $name"; and echo "Hello".$name; in PHP is that the first option uses double quotes to interpolate the variable $name within the string, while the second option concatenates the string "Hello" with the variable $name using the dot operator. Using double quotes with variable interpolation is a more concise and readable way to include variables within a string.

$name = "John";

// Using double quotes for variable interpolation
echo "Hello $name";

// Using concatenation with dot operator
echo "Hello" . $name;