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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 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.16, 8.3.0 - 8.3.3
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Fatal error: No code may exist outside of namespace {} in /in/60rlq on line 4
Process exited with code 255.

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