What are the potential pitfalls of concatenating strings in PHP, and what is the correct syntax to concatenate strings?

Potential pitfalls of concatenating strings in PHP include using the wrong concatenation operator, not properly escaping special characters, and not handling variables correctly within the concatenated string. The correct syntax to concatenate strings in PHP is to use the dot (.) operator to join two or more strings together.

// Correct syntax to concatenate strings in PHP
$string1 = "Hello";
$string2 = "World";
$concatenatedString = $string1 . " " . $string2;
echo $concatenatedString;