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run code in 300+ PHP versions simultaneously
<?php class A {} interface SomeInterface { public function test() : A; } class B implements SomeInterface { public function test() : A // all good! { return null; // Fatal error: Uncaught TypeError: Return value of B::test() must be an instance of A, null returned... } } ?>
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.6
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/5SH2o on line 7
Process exited with code 255.
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239.86 ms | 402 KiB | 330 Q