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<?php function machine_forget(&$data) { unset($data); } echo "normal\n"; $answer = 42; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); echo "\n"; echo "magic\n"; // shhh no spoilers eval(base64_decode('CmNsYXNzIHpvbWJpZQp7CiAgICBwcm90ZWN0ZWQgJHZhbDsKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2NvbnN0cnVjdCgkdmFsKQogICAgewogICAgICAgICR0aGlzLT52YWwgPSAkdmFsOwogICAgfQoKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2Rlc3RydWN0KCkKICAgIHsKICAgICAgICAkdGhpcy0+dmVzc2VsID0gJHRoaXM7CiAgICB9CgogICAgcHVibGljIGZ1bmN0aW9uIF9fdG9TdHJpbmcoKQogICAgewogICAgICAgIHJldHVybiAkdGhpcy0+dmFsOwogICAgfQp9CgokYW5zd2VyID0gbmV3IHpvbWJpZSgiNDIiKTsKJGFuc3dlci0+dmVzc2VsID0gJiRhbnN3ZXI7')); var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // DID NOT FORGET echo "\n"; echo "normal again\n"; $answer = 42; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // FORGOT
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
normal string(2) "42" string(2) "42" magic Deprecated: Creation of dynamic property zombie::$vessel is deprecated in /in/D2hnv(17) : eval()'d code on line 22 string(2) "42" string(2) "42" normal again string(2) "42" string(2) "42"
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
normal string(2) "42" string(2) "42" magic string(2) "42" string(2) "42" normal again string(2) "42" string(2) "42"
Output for 5.1.1 - 5.1.6
normal string(2) "42" string(2) "42" magic string(12) "Object id #1" string(12) "Object id #1" normal again string(12) "Object id #1" string(12) "Object id #1"
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/D2hnv on line 30
Process exited with code 255.
Output for 5.0.5
normal string(2) "42" string(2) "42" magic string(12) "Object id #1" string(12) "Object id #1" normal again string(2) "42" string(2) "42"
Output for 5.0.0 - 5.0.4
normal string(2) "42" string(2) "42" magic string(12) "Object id #1" string(12) "Object id #1" normal again string(2) "42" string(2) "42"
Process exited with code 139.
Output for 4.4.2 - 4.4.9
normal string(2) "42" string(2) "42" magic Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/D2hnv(17) : eval()'d code on line 4 string(2) "42" string(2) "42" normal again string(2) "42" string(2) "42"
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
normal string(2) "42" string(2) "42" magic Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/D2hnv(17) : eval()'d code on line 4 string(2) "42" string(2) "42" normal again string(2) "42" string(2) "42"
Process exited with code 255.
Output for 4.3.2 - 4.3.4
normal string(2) "42" string(2) "42" magic Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/D2hnv(17) : eval()'d code on line 4 string(2) "42" string(2) "42" normal again string(2) "42" string(2) "42"
Process exited with code 255.
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240.59 ms | 401 KiB | 340 Q