3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace ns1 { class JsonDumpTransformer{}; }; namespace ns2 { class SingleElementTransformer{}; }; namespace{ $lookup = [ 't-JsonDump' => \ns1\JsonDumpTransformer::class, 't-SingleElement' => \ns2\SingleElementTransformer::class, ]; $key = 't-SingleElement'; $class = $lookup[$key]; // Instantiate a object of type \ns1\JsonDumpTransformer #$object = ???; }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: No code may exist outside of namespace {} in /in/YZZYt on line 4
Process exited with code 255.

preferences:
266.95 ms | 402 KiB | 327 Q