Online PHP editor | output for tipCb

@ 2019-02-12T22:35:01Z

<?php
declare(strict_types=1);

$f = function (string $x): string { return $x; };

try {
    $f(1);
} catch (\TypeError $e) {
    echo 'Good, $f does not take ints' . PHP_EOL;
}

\assert(array_map($f, [1, 2, 3]) !== [1, 2, 3]);
\assert(array_map($f, [1, 2, 3]) === ['1', '2', '3']);
echo 'Huh ???' . PHP_EOL;

$p = function (string $_): bool { return false; };

try {
    $p(1);
} catch (\TypeError $e) {
    echo 'Good, $p does not take ints' . PHP_EOL;
}

\assert(array_filter([1, 2, 3], $p) === []);
echo 'Huh ???' . PHP_EOL;

/*
http://php.net/manual/en/functions.arguments.php#functions.arguments.type-declaration.strict

Strict typing applies to function calls made from within the file with strict typing enabled,
not to the functions declared within that file. If a file without strict typing enabled makes
a call to a function that was defined in a file with strict typing, the caller's preference
(weak typing) will be respected, and the value will be coerced.
*/

Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7: Good, $f does not take ints Huh ??? Good, $p does not take ints Huh ???
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Good, $f does not take ints Huh ??? Good, $p does not take ints Huh ???
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38: Warning: Unsupported declare 'strict_types' in /in/tipCb on line 2 Parse error: syntax error, unexpected ':', expecting '{' in /in/tipCb on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_FUNCTION in /in/tipCb on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_FUNCTION in /in/tipCb on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/tipCb on line 4
Process exited with code 255.

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