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What happens if you try to remove an action hook with a different priority than it was added with?

medium📝 component behavior Q5 of 15
Wordpress - WordPress Hooks System
What happens if you try to remove an action hook with a different priority than it was added with?
add_action('wp_footer', 'footer_message', 10);
remove_action('wp_footer', 'footer_message', 20);
AThe action is removed successfully
BWordPress throws an error
CThe action is not removed and still runs
DThe action runs twice
Step-by-Step Solution
Solution:
  1. Step 1: Understand priority in hooks

    Hooks added with a priority must be removed with the same priority.
  2. Step 2: Analyze the code

    Action added with priority 10 but removed with 20, so removal fails.
  3. Final Answer:

    The action is not removed and still runs -> Option C
  4. Quick Check:

    Priority mismatch prevents removal [OK]
Quick Trick: Match priority exactly to remove hooks [OK]
Common Mistakes:
  • Ignoring priority when removing hooks
  • Expecting removal without matching priority
  • Assuming WordPress errors on mismatch

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