Predefined Constants
The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
- INPUT_POST (integer)
- POST variables.
- INPUT_GET (integer)
- GET variables.
- INPUT_COOKIE (integer)
- COOKIE variables.
- INPUT_ENV (integer)
- ENV variables.
- INPUT_SERVER (integer)
- SERVER variables.
- INPUT_SESSION (integer)
- SESSION variables. (not implemented yet)
- INPUT_REQUEST (integer)
- REQUEST variables. (not implemented yet)
- FILTER_FLAG_NONE (integer)
- No flags.
- FILTER_REQUIRE_SCALAR (integer)
- Flag used to require scalar as input
- FILTER_REQUIRE_ARRAY (integer)
- Require an array as input.
- FILTER_FORCE_ARRAY (integer)
- Always returns an array.
- FILTER_NULL_ON_FAILURE (integer)
- Use NULL instead of FALSE on failure.
- FILTER_VALIDATE_INT (integer)
- ID of "int" filter.
- FILTER_VALIDATE_BOOLEAN (integer)
- ID of "boolean" filter.
- FILTER_VALIDATE_FLOAT (integer)
- ID of "float" filter.
- FILTER_VALIDATE_REGEXP (integer)
- ID of "validate_regexp" filter.
- FILTER_VALIDATE_URL (integer)
- ID of "validate_url" filter.
- FILTER_VALIDATE_EMAIL (integer)
- ID of "validate_email" filter.
- FILTER_VALIDATE_IP (integer)
- ID of "validate_ip" filter.
- FILTER_DEFAULT (integer)
- ID of default ("string") filter.
- FILTER_UNSAFE_RAW (integer)
- ID of "unsafe_raw" filter.
- FILTER_SANITIZE_STRING (integer)
- ID of "string" filter.
- FILTER_SANITIZE_STRIPPED (integer)
- ID of "stripped" filter.
- FILTER_SANITIZE_ENCODED (integer)
- ID of "encoded" filter.
- FILTER_SANITIZE_SPECIAL_CHARS (integer)
- ID of "special_chars" filter.
- FILTER_SANITIZE_EMAIL (integer)
- ID of "email" filter.
- FILTER_SANITIZE_URL (integer)
- ID of "url" filter.
- FILTER_SANITIZE_NUMBER_INT (integer)
- ID of "number_int" filter.
- FILTER_SANITIZE_NUMBER_FLOAT (integer)
- ID of "number_float" filter.
- FILTER_SANITIZE_MAGIC_QUOTES (integer)
- ID of "magic_quotes" filter.
- FILTER_CALLBACK (integer)
- ID of "callback" filter.
- FILTER_FLAG_ALLOW_OCTAL (integer)
- Allow octal notation (0[0-7]+) in "int" filter.
- FILTER_FLAG_ALLOW_HEX (integer)
- Allow hex notation (0x[0-9a-fA-F]+) in "int" filter.
- FILTER_FLAG_STRIP_LOW (integer)
- Strip characters with ASCII value less than 32.
- FILTER_FLAG_STRIP_HIGH (integer)
- Strip characters with ASCII value greater than 127.
- FILTER_FLAG_ENCODE_LOW (integer)
- Encode characters with ASCII value less than 32.
- FILTER_FLAG_ENCODE_HIGH (integer)
- Encode characters with ASCII value greater than 127.
- FILTER_FLAG_ENCODE_AMP (integer)
- Encode &.
- FILTER_FLAG_NO_ENCODE_QUOTES (integer)
- Don't encode ' and ".
- FILTER_FLAG_EMPTY_STRING_NULL (integer)
- (No use for now.)
- FILTER_FLAG_ALLOW_FRACTION (integer)
- Allow fractional part in "number_float" filter.
- FILTER_FLAG_ALLOW_THOUSAND (integer)
- Allow thousand separator (,) in "number_float" filter.
- FILTER_FLAG_ALLOW_SCIENTIFIC (integer)
- Allow scientific notation (e, E) in "number_float" filter.
- FILTER_FLAG_SCHEME_REQUIRED (integer)
- Require scheme in "validate_url" filter.
- FILTER_FLAG_HOST_REQUIRED (integer)
- Require host in "validate_url" filter.
- FILTER_FLAG_PATH_REQUIRED (integer)
- Require path in "validate_url" filter.
- FILTER_FLAG_QUERY_REQUIRED (integer)
- Require query in "validate_url" filter.
- FILTER_FLAG_IPV4 (integer)
- Allow only IPv4 address in "validate_ip" filter.
- FILTER_FLAG_IPV6 (integer)
- Allow only IPv6 address in "validate_ip" filter.
- FILTER_FLAG_NO_RES_RANGE (integer)
- Deny reserved addresses in "validate_ip" filter.
- FILTER_FLAG_NO_PRIV_RANGE (integer)
- Deny private addresses in "validate_ip" filter.