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run code in 300+ PHP versions simultaneously
<?php interface Foo { public function log($tag, $message); } function f(Foo $x) {} $a = null; f($a);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: f(): Argument #1 ($x) must be of type Foo, null given, called in /in/HjE2b on line 11 and defined in /in/HjE2b:7 Stack trace: #0 /in/HjE2b(11): f(NULL) #1 {main} thrown in /in/HjE2b on line 7
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 f() must implement interface Foo, null given, called in /in/HjE2b on line 11 and defined in /in/HjE2b:7 Stack trace: #0 /in/HjE2b(11): f(NULL) #1 {main} thrown in /in/HjE2b on line 7
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to f() must implement interface Foo, null given, called in /in/HjE2b on line 11 and defined in /in/HjE2b on line 7
Process exited with code 255.

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