validate (check vars) (tag)
| is_email() | Checks if the given string is an e-mail address. |
| rest_is_boolean() | Determines if a given value is a boolean or boolean-like. Doesn't look at the type of a given value, and like in PHP, |
| validate_file() | Checks a file path (including relative) for forbidden constructs and for compliance with the list of allowed files. |
| wp_http_validate_url() | Checks if the specified URL can be used in an HTTP request, for example in the HTTP API. |
| wp_validate_redirect() | Checks the specified URL for the possibility of using it for redirection. |
| wp_verify_fast_hash() | Checks whether a plaintext message matches the specified hash. |