3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace A { namespace B { } }
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.24
Fatal error: Namespace declarations cannot be nested in /in/bo5Oi on line 3
Process exited with code 255.
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182.58 ms | 1399 KiB | 61 Q