In PHP, how do I merge strings with strong typing?

php, strong typing, string merging, programming

This example demonstrates how to merge strings in PHP using strong typing.


        <?php
        // Merging strings with strong typing
        function mergeStrings(string $str1, string $str2): string {
            return $str1 . ' ' . $str2;
        }

        $firstPart = "Hello,";
        $secondPart = "world!";
        
        $result = mergeStrings($firstPart, $secondPart);
        echo $result; // Output: Hello, world!
        ?>