3v4l.org

run code in 300+ PHP versions simultaneously
<?php $value = 3; $callback = function ($what) use ($value) { return "You sent {$what} to the callback using {$value}."; } $hey = __LINE__; echo $callback($hey);
Output for 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '$hey' (T_VARIABLE) in /in/7c5Ve on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_VARIABLE in /in/7c5Ve on line 9
Process exited with code 255.
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197.9 ms | 1395 KiB | 62 Q