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<?php namespace Foo { function test($a, $b, $c) { var_dump(array_map('extract', [['res' => 123]])); var_dump($res); } test(1, 2, 3); } /*namespace { function test($a, $b, $c) { var_dump(call_user_func('func_get_args')); var_dump(call_user_func('get_defined_vars')); } test(1, 2, 3); }*/
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Cannot call extract() dynamically in /in/dsptb:5 Stack trace: #0 [internal function]: extract(Array) #1 /in/dsptb(5): array_map('extract', Array) #2 /in/dsptb(8): Foo\test(1, 2, 3) #3 {main} thrown in /in/dsptb on line 5
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Warning: Cannot call extract() dynamically in /in/dsptb on line 5 array(1) { [0]=> NULL } Notice: Undefined variable: res in /in/dsptb on line 6 NULL
Output for 7.3.32 - 7.3.33
Warning: Cannot call extract() dynamically in /in/dsptb on line 5 array(1) { [0]=> NULL } NULL
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
array(1) { [0]=> int(1) } int(123)

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