[Solved] Why does this code fail to update the meta value? update_post_meta(20, 'likes'); — Ans: Missing the new meta value parameter | Wordpress

Wordpress - Custom Fields and Meta Data

Why does this code fail to update the meta value?

update_post_meta(20, 'likes');

AMissing the new meta value parameter

BPost ID 20 does not exist

CMeta key 'likes' is invalid

Dupdate_post_meta() cannot update existing keys

Step-by-Step Solution

Solution:

Step 1: Check parameters of update_post_meta()
It requires post ID, meta key, and new meta value.
Step 2: Identify missing parameter
The new meta value is missing, so update fails.
Final Answer:
Missing the new meta value parameter -> Option A
Quick Check:
update_post_meta needs 3 parameters [OK]

Quick Trick: Always provide post ID, key, and value to update_post_meta() [OK]

Common Mistakes:

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Why does this code fail to update the meta value?