What is the correct concatenation operator to use in PHP?

In PHP, the correct concatenation operator to use is the dot (.) operator. This operator is used to combine two strings together. When concatenating strings in PHP, make sure to use the dot operator to avoid syntax errors and ensure the strings are properly combined.

// Concatenating two strings in PHP using the dot operator
$string1 = "Hello";
$string2 = "World";
$combinedString = $string1 . " " . $string2;
echo $combinedString;