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<?php function foo(&$arg) { echo "hi\n"; var_dump($arg); } $a = 'bar'; $b =& $a; call_user_func('foo', $b); call_user_func('foo', &$a);
Output for 5.4.0 - 5.4.44, 5.5.24 - 5.5.28, 5.6.8 - 5.6.12
Fatal error: Call-time pass-by-reference has been removed in /in/kdFDk on line 13
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated in /in/kdFDk on line 13 hi string(3) "bar" hi string(3) "bar"
Output for 5.2.7 - 5.2.17
Warning: Call-time pass-by-reference has been deprecated in /in/kdFDk on line 13 hi string(3) "bar" hi string(3) "bar"
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 call_user_func(). 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/kdFDk on line 13 hi string(3) "bar" hi string(3) "bar"
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 call_user_func(). 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/kdFDk on line 13 hi string(3) "bar" hi string(3) "bar"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 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 call_user_func(). 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/kdFDk on line 13 hi string(3) "bar" hi string(3) "bar"

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