What are best practices for concatenating strings in PHP?

When concatenating strings in PHP, it is best practice to use the dot (.) operator to join strings together. This is the most common and widely accepted method for concatenation in PHP. It is important to avoid using the "+" operator for concatenation as it may lead to unexpected results. Additionally, using double quotes ("") allows for variable interpolation within the string.

$string1 = "Hello";
$string2 = "World";

$concatenatedString = $string1 . " " . $string2;

echo $concatenatedString;