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<?php namespace Teste\A; const teste = 'abc'; class A { public function __toString(){ return 'teste'; } } echo Teste\A\teste;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
Fatal error: Uncaught Error: Undefined constant "Teste\A\Teste\A\teste" in /in/2sPmB:11 Stack trace: #0 {main} thrown in /in/2sPmB on line 11
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Undefined constant 'Teste\A\Teste\A\teste' in /in/2sPmB:11 Stack trace: #0 {main} thrown in /in/2sPmB on line 11
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Fatal error: Undefined constant 'Teste\A\Teste\A\teste' in /in/2sPmB on line 11
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/2sPmB on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/2sPmB on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/2sPmB on line 2
Process exited with code 255.

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