What are some best practices for concatenating strings in PHP?

When concatenating strings in PHP, it is best practice to use the "." operator to join strings together. This ensures that the code is more readable and maintainable compared to using other methods such as string interpolation or the concatenation assignment operator. Additionally, using the "." operator allows for easy concatenation of variables, constants, and other strings.

$string1 = "Hello";
$string2 = "World";
$concatenatedString = $string1 . " " . $string2;
echo $concatenatedString;