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parse_url() is discouraged because of inconsistency in the output across PHP versions; use wp_parse_url() instead.

rand() is discouraged. Use the far less predictable wp_rand() instead.

Unescaped parameter $type used in $wpdb->get_results("SELECT ID, post_date, post_title, post_parent FROM $wpdb->posts WHERE post_status IN ('publish') AND post_type = '$type' ORDER BY post_title $filter")\n$type used without escaping.\n$filter assigned unsafely at line 212:\n $filter .= ' LIMIT ' . $num_to_fetch\n$num_to_fetch used without escaping.

Missing "License" in Plugin Header. Please update your Plugin Header with a valid GPLv2 (or later) compatible license.

Detected usage of a non-sanitized input variable: $_POST['nonce']

Use of a direct database call is discouraged.

Direct database call without caching detected. Consider using wp_cache_get() / wp_cache_set() or wp_cache_delete().

Use placeholders and $wpdb->prepare(); found interpolated variable $type at "SELECT ID, post_date, post_title, post_parent FROM $wpdb->posts WHERE post_status IN ('publish') AND post_type = '$type' ORDER BY post_title $filter"

Use placeholders and $wpdb->prepare(); found interpolated variable $filter at "SELECT ID, post_date, post_title, post_parent FROM $wpdb->posts WHERE post_status IN ('publish') AND post_type = '$type' ORDER BY post_title $filter"

Using exclusionary parameters, like exclude, in calls to get_posts() should be done with caution, see https://wpvip.com/documentation/performance-improvements-by-removing-usage-of-post__not_in/ for more information.