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
(int) - POST variables.
-
INPUT_GET
(int) - GET variables.
- COOKIE variables.
-
INPUT_ENV
(int) - ENV variables.
-
INPUT_SERVER
(int) - SERVER variables.
-
INPUT_SESSION
(int) - SESSION variables. (not implemented yet)
-
INPUT_REQUEST
(int) - REQUEST variables. (not implemented yet)
-
FILTER_FLAG_NONE
(int) - No flags.
-
FILTER_REQUIRE_SCALAR
(int) - Flag used to require scalar as input
-
FILTER_REQUIRE_ARRAY
(int) - Require an array as input.
-
FILTER_FORCE_ARRAY
(int) - Always returns an array.
-
FILTER_NULL_ON_FAILURE
(int) - Use NULL instead of FALSE on failure.
-
FILTER_VALIDATE_INT
(int) - ID of "int" filter.
-
FILTER_VALIDATE_BOOL
(int) -
Alias of
FILTER_VALIDATE_BOOLEAN
. -
FILTER_VALIDATE_BOOLEAN
(int) - ID of "boolean" filter.
-
FILTER_VALIDATE_FLOAT
(int) - ID of "float" filter.
-
FILTER_VALIDATE_REGEXP
(int) - ID of "validate_regexp" filter.
-
FILTER_VALIDATE_URL
(int) - ID of "validate_url" filter.
-
FILTER_VALIDATE_DOMAIN
(int) - ID of "validate_domain" filter. (Available as of PHP 7.0.0)
-
FILTER_VALIDATE_EMAIL
(int) - ID of "validate_email" filter.
-
FILTER_VALIDATE_IP
(int) - ID of "validate_ip" filter.
-
FILTER_VALIDATE_MAC
(int) - ID of "validate_mac_address" filter.
-
FILTER_DEFAULT
(int) -
ID of default ("unsafe_raw") filter. This is equivalent to
FILTER_UNSAFE_RAW
. -
FILTER_UNSAFE_RAW
(int) - ID of "unsafe_raw" filter.
-
FILTER_SANITIZE_STRING
(int) - ID of "string" filter. (Deprecated as of PHP 8.1.0, use htmlspecialchars() instead.)
-
FILTER_SANITIZE_STRIPPED
(int) - ID of "stripped" filter. (Deprecated as of PHP 8.1.0, use htmlspecialchars() instead.)
-
FILTER_SANITIZE_ENCODED
(int) - ID of "encoded" filter.
-
FILTER_SANITIZE_SPECIAL_CHARS
(int) - ID of "special_chars" filter.
-
FILTER_SANITIZE_EMAIL
(int) - ID of "email" filter.
-
FILTER_SANITIZE_URL
(int) - ID of "url" filter.
-
FILTER_SANITIZE_NUMBER_INT
(int) - ID of "number_int" filter.
-
FILTER_SANITIZE_NUMBER_FLOAT
(int) - ID of "number_float" filter.
-
FILTER_SANITIZE_MAGIC_QUOTES
(int) -
ID of "magic_quotes" filter.
(DEPRECATED as of PHP 7.3.0 and
REMOVED as of PHP 8.0.0,
use
FILTER_SANITIZE_ADD_SLASHES
instead.) -
FILTER_SANITIZE_ADD_SLASHES
(int) - ID of "add_slashes" filter. (Available as of PHP 7.3.0)
-
FILTER_CALLBACK
(int) - ID of "callback" filter.
-
FILTER_FLAG_ALLOW_OCTAL
(int) -
Allow octal notation (
0[0-7]+
) in "int" filter. -
FILTER_FLAG_ALLOW_HEX
(int) -
Allow hex notation (
0x[0-9a-fA-F]+
) in "int" filter. -
FILTER_FLAG_STRIP_LOW
(int) - Strip characters with ASCII value less than 32.
-
FILTER_FLAG_STRIP_HIGH
(int) - Strip characters with ASCII value greater than 127.
-
FILTER_FLAG_STRIP_BACKTICK
(int) - Strips backtick characters.
-
FILTER_FLAG_ENCODE_LOW
(int) - Encode characters with ASCII value less than 32.
-
FILTER_FLAG_ENCODE_HIGH
(int) - Encode characters with ASCII value greater than 127.
-
FILTER_FLAG_ENCODE_AMP
(int) -
Encode
&
. -
FILTER_FLAG_NO_ENCODE_QUOTES
(int) -
Don't encode
'
and"
. -
FILTER_FLAG_EMPTY_STRING_NULL
(int) - (No use for now.)
-
FILTER_FLAG_ALLOW_FRACTION
(int) - Allow fractional part in "number_float" filter.
-
FILTER_FLAG_ALLOW_THOUSAND
(int) -
Allow thousand separator (
,
) in "number_float" filter. -
FILTER_FLAG_ALLOW_SCIENTIFIC
(int) -
Allow scientific notation (
e
,E
) in "number_float" filter. -
FILTER_FLAG_PATH_REQUIRED
(int) - Require path in "validate_url" filter.
-
FILTER_FLAG_QUERY_REQUIRED
(int) - Require query in "validate_url" filter.
-
FILTER_FLAG_SCHEME_REQUIRED
(int) - Require scheme in "validate_url" filter. (Deprecated as of PHP 7.3.0 and removed as of PHP 8.0.0, as it is implied in the filter already.)
-
FILTER_FLAG_HOST_REQUIRED
(int) - Require host in "validate_url" filter. (Deprecated as of PHP 7.3.0 and removed as of PHP 8.0.0, as it is implied in the filter already.)
-
FILTER_FLAG_HOSTNAME
(int) - Require hostnames to start with an alphanumeric character and contain only alphanumerics or hyphens. (Available as of PHP 7.0.0)
-
FILTER_FLAG_IPV4
(int) - Allow only IPv4 address in "validate_ip" filter.
-
FILTER_FLAG_IPV6
(int) - Allow only IPv6 address in "validate_ip" filter.
-
FILTER_FLAG_NO_RES_RANGE
(int) - Deny reserved addresses in "validate_ip" filter.
-
FILTER_FLAG_NO_PRIV_RANGE
(int) - Deny private addresses in "validate_ip" filter.
-
FILTER_FLAG_EMAIL_UNICODE
(int) - Accepts Unicode characters in the local part in "validate_email" filter. (Available as of PHP 7.1.0)