3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a($number){ return(b($number)* $ number); } function b(&$number){ ++$number; } echo a(5);
Output for 5.4.0 - 5.4.29
Parse error: syntax error, unexpected 'number' (T_STRING), expecting variable (T_VARIABLE) or '$' in /in/FabAR on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_STRING, expecting T_VARIABLE or '$' in /in/FabAR on line 3
Process exited with code 255.
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198.03 ms | 1395 KiB | 66 Q