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Why does the tax_query parameter require an array of arrays in WordPress queries?

hard📝 Conceptual Q10 of 15
Wordpress - WordPress Query and Database
Why does the tax_query parameter require an array of arrays in WordPress queries?
ABecause WordPress only supports one taxonomy filter at a time
BTo allow multiple taxonomy filters combined with relation operators
CTo simplify the query by using a single taxonomy filter
DBecause tax_query only accepts string values
Step-by-Step Solution
Solution:
  1. Step 1: Understand tax_query purpose

    tax_query allows filtering posts by one or more taxonomy terms.
  2. Step 2: Explain array of arrays structure

    It uses an array of arrays so you can combine multiple taxonomy filters with 'AND' or 'OR' relations.
  3. Final Answer:

    To allow multiple taxonomy filters combined with relation operators -> Option B
  4. Quick Check:

    tax_query = multiple filters with relations [OK]
Quick Trick: Use array of arrays in tax_query for multiple filters [OK]
Common Mistakes:
  • Thinking tax_query supports only one filter
  • Assuming tax_query accepts strings only
  • Confusing tax_query with meta_query

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