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<?php namespace Test; class Test { private $s; private $i; public function __construct(string $s, int $i) { $this->s = $s; $this->i = $i; } public function foo() { return 's: ' . $this->s . ', i: ' . $this->i; } } $a = new Test(new Test('Hello, world!', 2016), '2015'); echo $a->foo();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught TypeError: Test\Test::__construct(): Argument #1 ($s) must be of type string, Test\Test given, called in /in/dOtsd on line 21 and defined in /in/dOtsd:10 Stack trace: #0 /in/dOtsd(21): Test\Test->__construct(Object(Test\Test), '2015') #1 {main} thrown in /in/dOtsd on line 10
Process exited with code 255.
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 Fatal error: Uncaught TypeError: Test\Test::__construct(): Argument #1 ($s) must be of type string, Test\Test given, called in /in/dOtsd on line 21 and defined in /in/dOtsd:10 Stack trace: #0 /in/dOtsd(21): Test\Test->__construct(Object(Test\Test), '2015') #1 {main} thrown in /in/dOtsd on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to Test\Test::__construct() must be of the type string, object given, called in /in/dOtsd on line 21 and defined in /in/dOtsd:10 Stack trace: #0 /in/dOtsd(21): Test\Test->__construct(Object(Test\Test), '2015') #1 {main} thrown in /in/dOtsd on line 10
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to Test\Test::__construct() must be an instance of Test\string, string given, called in /in/dOtsd on line 21 and defined in /in/dOtsd on line 10
Process exited with code 255.

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