How can strings be correctly concatenated in PHP to ensure proper formatting and functionality?

To concatenate strings in PHP, you can use the "." operator. However, to ensure proper formatting and functionality, it's important to pay attention to spaces and other characters between the strings being concatenated. You can use concatenation within echo statements, assign concatenated strings to variables, or use the concatenation directly within functions or methods.

// Concatenating strings with proper formatting
$string1 = "Hello";
$string2 = "World";
$fullString = $string1 . " " . $string2;
echo $fullString;