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run code in 150+ php & hhvm versions
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<?php function machine_forget(&$data) { $data = null; } $answer = 90; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // shhh no spoilers class zombie { protected $val; public function __construct($val) { $this->val = $val; } public function __destruct() { $this->vessel = $this; } public function __toString() { return $this->val; } } $answer = new zombie(&$answer); $answer->vessel = &$answer; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer);
based on dNbe8
Output for 5.4.0 - 5.4.32
Fatal error: Call-time pass-by-reference has been removed in /in/OLO1Y on line 32
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated in /in/OLO1Y on line 32 string(2) "90" string(0) "" Catchable fatal error: Method zombie::__toString() must return a string value in /in/OLO1Y on line 35
Process exited with code 255.
Output for 5.2.7 - 5.2.17
Warning: Call-time pass-by-reference has been deprecated in /in/OLO1Y on line 32 string(2) "90" string(0) "" Catchable fatal error: Method zombie::__toString() must return a string value in /in/OLO1Y on line 35
Process exited with code 255.
Output for 5.2.5 - 5.2.6
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /in/OLO1Y on line 32 string(2) "90" string(0) "" Catchable fatal error: Method zombie::__toString() must return a string value in /in/OLO1Y on line 35
Process exited with code 255.
Output for 5.2.1 - 5.2.4
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. in /in/OLO1Y on line 32 string(2) "90" string(0) "" Catchable fatal error: Method zombie::__toString() must return a string value in /in/OLO1Y on line 35
Process exited with code 255.
Output for 5.2.0
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/OLO1Y on line 32 string(2) "90" string(0) "" Catchable fatal error: Method zombie::__toString() must return a string value in /in/OLO1Y on line 35
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/OLO1Y on line 32 string(2) "90" string(0) "" string(12) "Object id #1" string(12) "Object id #1"
Output for 5.0.5
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/OLO1Y on line 32 string(2) "90" string(0) "" string(12) "Object id #1" string(0) ""
Output for 5.0.0 - 5.0.4
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/OLO1Y on line 32 string(2) "90" string(0) "" string(12) "Object id #1" string(0) ""
Process exited with code 139.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/OLO1Y on line 15
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/OLO1Y on line 15
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/OLO1Y on line 15
Process exited with code 255.