Using grep to assist with finding key words in code that could possibly be problematic. (WPCampus 2017 CampusPress code review presentation)
grep -nr 'file_get_contents\|wp_remote_\|wp_feed_cache_transient_lifetime\|base64_decode\|SHOW TABLES\|WP_DEBUG\|error_reporting\|display_errors\|scream.enabled\|rewrite_rules\|flush_rules\|googlesyndication.com\|remove_role\|ALLOW_EXTERNAL\|ofc_upload_image.php\|woothemes_framework_update_head\|wpdb\|CURLOPT_CONNECTTIMEOUT\|WPCom_Theme_Updater\|dbDelta\|mysql_connect\|wp_mkdir_p\|wp_cache_flush\|wp_clean_plugins_cache\|wp_cache_delete\|do_shortcode\|switch_to_blog' .