3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($a) {}; $a = 123; foo(&$a);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.30, 7.2.0 - 7.2.20, 7.3.0 - 7.3.7
Parse error: syntax error, unexpected '&' in /in/MFXsJ on line 6
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call-time pass-by-reference has been removed; If you would like to pass argument by reference, modify the declaration of foo(). in /in/MFXsJ on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of foo(). 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/MFXsJ on line 6
Output for 5.2.5 - 5.2.17
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of foo(). 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/MFXsJ on line 6
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 foo(). 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/MFXsJ on line 6
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 foo(). 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/MFXsJ on line 6

preferences:
307.89 ms | 1401 KiB | 310 Q