Remove posts with empty content from WordPress Search Results

exclude_empty_post_content.php

<?php 
/**
* Exclude posts with empty post_content from search results
*/
function modify_search_query( $query ) {
	// Check if this is a search query and not an admin query
	if ( $query->is_search() && ! is_admin() ) {
		// Add a filter to exclude posts with empty post_content
		add_filter( 'posts_where', 'exclude_empty_post_content' );

		// Remove the filter after the search query has been modified
		add_action( 'wp', function() {
			remove_filter( 'posts_where', 'exclude_empty_post_content' );
		} );
	}
}

function exclude_empty_post_content( $where ) {
	global $wpdb;
	
	// Add a condition to exclude posts with empty post_content
	$where .= " AND ({$wpdb->prefix}posts.post_content != '')";
	
	return $where;
}

add_action( 'pre_get_posts', 'modify_search_query' );