预定义常量

下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

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_VALIDATE_MAC ( integer ): ID of "validate_mac_address" filter. (Available as of PHP 5.5.0)
FILTER_DEFAULT ( integer ): ID of default ("unsafe_raw") filter. This is equivalent to FILTER_UNSAFE_RAW .
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_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.

用户评论:

[#1] sixd at php dot net [2010-12-23 10:37:20]

Rasmus added FILTER_SANITIZE_FULL_SPECIAL_CHARS to PHP 5.3.3. See
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/
ext/filter/filter.c?r1=297245&r2=297244&pathrev=297245
His earlier commit to the PHP source code trunk commented that this "Added the full htmlspecialchars() functionality which includes utf-8 validation as a default filter."