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<?php class Foo { private $a; public function __construct(int $a) { $this->a = $a; } } $foo = new Foo(1); $bar = new $foo(2); var_dump($foo); var_dump($bar);
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 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
object(Foo)#1 (1) { ["a":"Foo":private]=> int(1) } object(Foo)#2 (1) { ["a":"Foo":private]=> int(2) }
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 object(Foo)#1 (1) { ["a":"Foo":private]=> int(1) } object(Foo)#2 (1) { ["a":"Foo":private]=> int(2) }
Output for 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 - 5.6.38
Catchable fatal error: Argument 1 passed to Foo::__construct() must be an instance of int, integer given, called in /in/HLN7O on line 15 and defined in /in/HLN7O on line 8
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Argument 1 passed to Foo::__construct() must be an object of class int, called in /in/HLN7O on line 15 and defined in /in/HLN7O on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 1 must be an object of class int in /in/HLN7O on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/HLN7O 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 T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/HLN7O on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/HLN7O on line 6
Process exited with code 255.

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