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What will happen if you register a custom taxonomy with the same name as an existing built-in taxonomy like category?

medium📝 component behavior Q5 of 15
Wordpress - Custom Post Types and Taxonomies
What will happen if you register a custom taxonomy with the same name as an existing built-in taxonomy like category?
AIt will cause a fatal error and stop the site
BIt may cause unexpected behavior or conflicts
CThe custom taxonomy will be ignored silently
DWordPress will override the built-in taxonomy
Step-by-Step Solution
Solution:
  1. Step 1: Understand taxonomy naming conflicts

    Registering a taxonomy with a name already used by WordPress core can cause conflicts.
  2. Step 2: Identify the result of conflict

    WordPress does not throw fatal errors but behavior becomes unpredictable, causing issues in queries and admin UI.
  3. Final Answer:

    It may cause unexpected behavior or conflicts -> Option B
  4. Quick Check:

    Duplicate taxonomy name = conflicts, no fatal error [OK]
Quick Trick: Avoid using built-in taxonomy names for custom taxonomies [OK]
Common Mistakes:
  • Expecting WordPress to override safely
  • Thinking it causes fatal errors
  • Assuming custom taxonomy is ignored

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