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run code in 200+ PHP versions simultaneously
<?php function foo($a) {}; $a = 123; foo(&$a);
Output for 7.0.0 - 7.3.7
Parse error: syntax error, unexpected '&' in /in/MFXsJ on line 6
Process exited with code 255.
Output for 5.4.0 - 5.6.40
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 - 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