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@ 2016-08-07T06:53:10Z

<?php

try {
    function hello_1(?string $whom): ?string {
        if ($whom !== null) {
            return "Hello $whom";
        }
    }
    
    var_dump(hello_1(null));
} catch (\Error $e) {
    echo $e->getMessage() . PHP_EOL;
}

/*try {
    function hello_2(?string $whom): ?string {
        if ($whom !== null) {
            return "Hello $whom";
        }
        return;
    }
    
    var_dump(hello_2(null));
} catch (\Error $e) {
    echo $e->getMessage() . PHP_EOL;
}

Fatal error: A function with return type must return a value (did you mean "return null;" instead of "return;"?) in /in/QRj2G on line 20
*/

try {
    function hello_3(?string $whom): ?string {
        if ($whom !== null) {
            return "Hello $whom";
        }
        return null;
    }
    
    var_dump(hello_3(null));
} catch (\Error $e) {
    echo $e->getMessage() . PHP_EOL;
}

Output for git.master, git.master_jit, rfc.property-hooks: hello_1(): Return value must be of type ?string, none returned NULL

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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