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Which WordPress function is used to add a new setting to the database if it does not exist?

easy📝 Conceptual Q1 of 15
Wordpress - WordPress Settings and Configuration
Which WordPress function is used to add a new setting to the database if it does not exist?
Aupdate_option()
Badd_option()
Cget_option()
Dregister_setting()
Step-by-Step Solution
Solution:

  1. Step 1: Understand the purpose of add_option()

    add_option() adds a new setting only if it does not exist already in the database.

  2. Step 2: Compare with other functions

    update_option() updates or adds a setting, get_option() reads a setting, register_setting() registers a setting for settings API but does not add it to the database.

  3. Final Answer:

    add_option() -> Option B

  4. Quick Check:

    Function to add new setting = add_option() [OK]
Quick Trick: Use add_option() to add new settings only if missing [OK]
Common Mistakes:
  • Confusing update_option() with add_option()
  • Using get_option() to write settings
  • Thinking register_setting() adds settings to DB

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