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<?php class NestedFunctions { public function fn1() { function nested_fn() { echo 'yay' . "\n"; } nested_fn(); } public function fn2() { function nested_fn() { echo 'yay' . "\n"; } nested_fn(); } } $nested = new NestedFunctions(); $nested->fn1(); $nested->fn2();
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
yay Fatal error: Cannot redeclare nested_fn() (previously declared in /in/WABfQ:7) in /in/WABfQ on line 13
Process exited with code 255.

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