Are there any potential pitfalls to be aware of when combining variables in PHP?

One potential pitfall to be aware of when combining variables in PHP is the use of inconsistent data types. When concatenating strings with numbers, PHP will automatically convert the numbers to strings. However, if you are not careful, this can lead to unexpected results or errors in your code. To avoid this issue, make sure to explicitly cast variables to the correct data type before combining them.

$number = 10;
$string = "The number is: " . (string)$number;
echo $string;