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Just wondering what the preferred method of using anonymous functions is.

First I had some code like this:

function page_columns( $columns ) {
    $columns = array(
        'cb' => '<input type="checkbox" />',
        'title' => 'Title',
        'author' => 'Author',
        'template' => 'Template',
        'date' => 'Date'
    );

    return $columns;
}
add_filter('manage_edit-page_columns', 'page_columns');

But I know WordPress discourages using variables for things that will only be used once so I switched it to

function page_columns( $columns ) {
    return array(
        'cb' => '<input type="checkbox" />',
        'title' => 'Title',
        'author' => 'Author',
        'template' => 'Template',
        'date' => 'Date'
    );
}
add_filter('manage_edit-page_columns', 'page_columns');

But now I'm thinking why even use a function at all?

add_filter('manage_edit-page_columns', function(){
    return array(
        'cb' => '<input type="checkbox" />',
        'title' => 'Title',
        'author' => 'Author',
        'template' => 'Template',
        'date' => 'Date'
    );
});

What is the preferred method? Any reason why? Perhaps update the WordPress Coding Standards?

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1 Answer 1

Use the second option. Adding anonymous functions as filters and actions is highly discouraged!!!

If you add an anonymous function in this fashion, it's impossible to remove later on down the road by other plugins and code. So please, please, please don't do that.

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