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

In PHP, you can concatenate strings using the dot (.) operator. Here’s a simple example to illustrate strong typing and how to concatenate strings.

Keywords: PHP, string concatenation, strong typing

Description: This example demonstrates how to concatenate strings in PHP while ensuring type safety.


    <?php
    function concatenateStrings(string $str1, string $str2): string {
        return $str1 . $str2;
    }

    $firstName = "John";
    $lastName = "Doe";
    $fullName = concatenateStrings($firstName, " " . $lastName);

    echo $fullName; // Output: John Doe
    ?>