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<?php interface I1 { const C1 = '';} class C3 implements I1 { const C1 = 'c2';} $c3 = new C3; var_dump($c3::C1);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(2) "c2"
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 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
Fatal error: Cannot inherit previously-inherited or override constant C1 from interface I1 in /in/jIcs6 on line 3
Process exited with code 255.

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