[Solved] Find the mistake in this plugin code:add_filter('the_content', 'modify_content');\nfunction modify_content($content) {\n $content = strtoupper($content);\n} | Wordpress

Wordpress - Plugins and Extensibility

Find the mistake in this plugin code:

add_filter('the_content', 'modify_content');\nfunction modify_content($content) {\n  $content = strtoupper($content);\n}

AFunction name must be 'filter_content'

BFilter name 'the_content' is invalid

Cstrtoupper cannot be used in plugins

DFunction does not return the modified content

Step-by-Step Solution

Solution:

Step 1: Check function behavior
The function modifies $content but does not return it, so filter output is unchanged.
Step 2: Validate filter and function name
'the_content' is a valid filter and function name can be arbitrary.
Final Answer:
Function does not return the modified content -> Option D
Quick Check:
Filters must return modified value [OK]

Quick Trick: Always return modified content in filters [OK]

Common Mistakes:

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Find the mistake in this plugin code: