| sanitize_email() | Strips out all characters that are not allowable in an email. |
| sanitize_file_name() | Sanitizes a filename, replacing whitespace with dashes. |
| sanitize_html_class() | Sanitizes an HTML classname to ensure it only contains valid characters. |
| sanitize_meta() | Sanitize meta value. |
| sanitize_option() | Sanitises various option values based on the nature of the option. |
| sanitize_post() | Sanitize every post field. |
| sanitize_post_field() | Sanitize post field based on context. |
| sanitize_sql_orderby() | Ensures a string is a valid SQL 'order by' clause. |
| sanitize_term() | Sanitize all fields of the taxonomy element (term) using the |
| sanitize_term_field() | Prepares (cleanse) term field value for use it in a text or elsewhere (depends on cleaning context). |
| sanitize_text_field() | Sanitizes the passed string leaving clean text: without HTML tags, line breaks, etc. |
| sanitize_textarea_field() | Sanitizes a multiline string from user input or from the database. |
| sanitize_title() | Sanitizes a title, or returns a fallback title. |
| sanitize_title_with_dashes() | Sanitizes a title, replacing whitespace and a few other characters with dashes. |
| sanitize_user() | Sanitizes a username, stripping out unsafe characters. |
| wc_clean() | Clean variables using sanitize_text_field. Arrays are cleaned recursively. Non-scalar values are ignored. |
| wp_parse_slug_list() | Clean up an array, comma- or space-separated list of slugs. |
| wp_rel_nofollow() | Adds rel nofollow string to all HTML A elements in content. |