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<?php const TAXONOMY_HIERARCHY_DISABLED = 0; interface VocabularyInterface { const HIERARCHY_DISABLED = 0; } var_dump(TAXONOMY_HIERARCHY_DISABLED === VocabularyInterface::HIERARCHY_DISABLED);
Output for 5.6.0 - 5.6.26, 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
bool(true)

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106.45 ms | 1545 KiB | 4 Q