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<?php $url = ''; /** @var non-empty-string|null $s */ function take_non_empty_string_or_null(?string $s): void { echo (string) $s; } function take_any_string(string $s): void { echo $s; } function take_an_int_or_null(?int $s): void { echo (int) $s; } /** * @param array{path: string} $arr */ function take_url(array $arr): void { foreach($arr as $v) { if (null !== $v) { take_any_string($v); } } } var_dump(parse_url($url)); // array{} take_non_empty_string_or_null(parse_url($url, PHP_URL_SCHEME)); // null|non-empty-string take_non_empty_string_or_null(parse_url($url, PHP_URL_USER)); // null|non-empty-string take_non_empty_string_or_null(parse_url($url, PHP_URL_PASS)); // null|non-empty-string take_any_string(parse_url($url, PHP_URL_HOST)); // string take_an_int_or_null(parse_url($url, PHP_URL_PORT)); // null|int take_non_empty_string_or_null(parse_url($url, PHP_URL_PATH)); // null|non-empty-string take_non_empty_string_or_null(parse_url($url, PHP_URL_QUERY)); // null|non-empty-string take_non_empty_string_or_null(parse_url($url, PHP_URL_FRAGMENT)); // null|non-empty-string
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.29, 8.4.1 - 8.4.16, 8.5.0 - 8.5.1
array(1) { ["path"]=> string(0) "" } Fatal error: Uncaught TypeError: take_any_string(): Argument #1 ($s) must be of type string, null given, called in /in/rtC6Q on line 33 and defined in /in/rtC6Q:10 Stack trace: #0 /in/rtC6Q(33): take_any_string(NULL) #1 {main} thrown in /in/rtC6Q on line 10
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(1) { ["path"]=> string(0) "" } Fatal error: Uncaught TypeError: Argument 1 passed to take_any_string() must be of the type string, null given, called in /in/rtC6Q on line 33 and defined in /in/rtC6Q:10 Stack trace: #0 /in/rtC6Q(33): take_any_string(NULL) #1 {main} thrown in /in/rtC6Q on line 10
Process exited with code 255.
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/rtC6Q on line 6
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '?', expecting '&' or variable (T_VARIABLE) in /in/rtC6Q on line 6
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '?', expecting '&' or T_VARIABLE in /in/rtC6Q on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '?', expecting '&' or T_VARIABLE in /in/rtC6Q on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '?', expecting ')' in /in/rtC6Q on line 6
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
Parse error: parse error, unexpected '?', expecting ')' in /in/rtC6Q on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/rtC6Q on line 6
Process exited with code 255.
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