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<?php namespace { class test { } echo test::class_name . "\n"; } namespace test { class namespacetest { } echo namespacetest::class_name; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant test::class_name in /in/Um9ho:8 Stack trace: #0 {main} thrown in /in/Um9ho on line 8
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Undefined class constant 'class_name' in /in/Um9ho:8 Stack trace: #0 {main} thrown in /in/Um9ho on line 8
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Undefined class constant 'class_name' in /in/Um9ho on line 8
Process exited with code 255.

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