[Solved] Why does the following code not pass the second argument to my_function?add_action('save_post', 'my_function', 10, 1); function my_function($post_id, $post) { // code } | Wordpress

Wordpress - WordPress Hooks System

Why does the following code not pass the second argument to my_function?

add_action('save_post', 'my_function', 10, 1);
function my_function($post_id, $post) {
  // code
}

ABecause priority 10 prevents multiple arguments

BBecause <code>add_action</code> specifies only 1 accepted argument

CBecause the function name is incorrect

DBecause the hook <code>save_post</code> does not pass any arguments

Step-by-Step Solution

Solution:

Step 1: Check accepted args parameter
The code specifies 1 accepted argument, so WordPress passes only the first argument.
Step 2: Confirm hook passes multiple arguments
The save_post hook passes 2 arguments, but only one is accepted here.
Final Answer:
Because add_action specifies only 1 accepted argument -> Option B
Quick Check:
Accepted args limits arguments passed [OK]

Quick Trick: Accepted args controls how many hook arguments your function gets [OK]

Common Mistakes:

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Why does the following code not pass the second argument to my_function?