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<?php $generator = function (bool $return) { if ($return) { return 1; } yield 2; return 3; }; $gen1 = $generator(false); $gen2 = $generator(true); var_dump($gen1->valid()); var_dump($gen2->valid()); var_dump($gen2->getReturn());
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
bool(true) bool(false) int(1)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Generators cannot return values using "return" in /in/oE2BK on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '2' (T_LNUMBER) in /in/oE2BK on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER in /in/oE2BK on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4, 5.2.6 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/oE2BK on line 3
Process exited with code 255.
Output for 5.2.5

Process exited with code 137.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/oE2BK on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/oE2BK on line 3
Process exited with code 255.
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