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<?php function string_internal(string $input): string { return $input; } function string(mixed $input, bool $passNull = false): string { if ($passNull && $input === null) return null; return string_internal($input); } $input = 123; $str = string($input); var_dump($str);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.15, 8.5.0
string(3) "123"
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to string() must be an instance of mixed, int given, called in /in/ldvFb on line 11 and defined in /in/ldvFb:4 Stack trace: #0 /in/ldvFb(11): string(123) #1 {main} thrown in /in/ldvFb on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34
Fatal error: Uncaught TypeError: Argument 1 passed to string() must be an instance of mixed, integer given, called in /in/ldvFb on line 11 and defined in /in/ldvFb:4 Stack trace: #0 /in/ldvFb(11): string(123) #1 {main} thrown in /in/ldvFb on line 4
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, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/ldvFb on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' in /in/ldvFb on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/ldvFb on line 3
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 T_STRING, expecting ')' in /in/ldvFb on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/ldvFb on line 3
Process exited with code 255.
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