| FILTER_VALIDATE_INT | "int" |
min_range,
max_range
|
FILTER_FLAG_ALLOW_OCTAL,
FILTER_FLAG_ALLOW_HEX
| Validates value as integer, optionally from the specified range. |
| FILTER_VALIDATE_BOOLEAN | "boolean" | | |
Returns TRUE for "1", "true", "on" and "yes",
FALSE for "0", "false", "off", "no", and "",
NULL otherwise.
|
| FILTER_VALIDATE_FLOAT | "float" | | | Validates value as float. |
| FILTER_VALIDATE_REGEXP | "validate_regexp" |
regexp
| |
Validates value against regexp, a
Perl-compatible regular expression.
|
| FILTER_VALIDATE_URL | "validate_url" | |
FILTER_FLAG_SCHEME_REQUIRED,
FILTER_FLAG_HOST_REQUIRED,
FILTER_FLAG_PATH_REQUIRED,
FILTER_FLAG_QUERY_REQUIRED
| Validates value as URL, optionally with required components. |
| FILTER_VALIDATE_EMAIL | "validate_email" | | | Validates value as e-mail. |
| FILTER_VALIDATE_IP | "validate_ip" | |
FILTER_FLAG_IPV4,
FILTER_FLAG_IPV6,
FILTER_FLAG_NO_PRIV_RANGE,
FILTER_FLAG_NO_RES_RANGE
|
Validates value as IP address, optionally only IPv4 or IPv6 or not
from private or reserved ranges.
|
| FILTER_SANITIZE_STRING | "string" | |
FILTER_FLAG_NO_ENCODE_QUOTES,
FILTER_FLAG_STRIP_LOW,
FILTER_FLAG_STRIP_HIGH,
FILTER_FLAG_ENCODE_LOW,
FILTER_FLAG_ENCODE_HIGH,
FILTER_FLAG_ENCODE_AMP
| Strip tags, optionally strip or encode special characters. |
| FILTER_SANITIZE_STRIPPED | "stripped" | | | Alias of "string" filter. |
| FILTER_SANITIZE_ENCODED | "encoded" | |
FILTER_FLAG_STRIP_LOW,
FILTER_FLAG_STRIP_HIGH,
FILTER_FLAG_ENCODE_LOW,
FILTER_FLAG_ENCODE_HIGH
| URL-encode string, optionally strip or encode special characters. |
| FILTER_SANITIZE_SPECIAL_CHARS | "special_chars" | |
FILTER_FLAG_STRIP_LOW,
FILTER_FLAG_STRIP_HIGH,
FILTER_FLAG_ENCODE_HIGH
|
HTML-escape '"<>& and characters with
ASCII value less than 32, optionally strip or encode other special
characters.
|
| FILTER_UNSAFE_RAW | "unsafe_raw" | |
FILTER_FLAG_STRIP_LOW,
FILTER_FLAG_STRIP_HIGH,
FILTER_FLAG_ENCODE_LOW,
FILTER_FLAG_ENCODE_HIGH,
FILTER_FLAG_ENCODE_AMP
| Do nothing, optionally strip or encode special characters. |
| FILTER_SANITIZE_EMAIL | "email" | | |
Remove all characters except letters, digits and
!#$%&'*+-/=?^_`{|}~@.[].
|
| FILTER_SANITIZE_URL | "url" | | |
Remove all characters except letters, digits and
$-_.+!*'(),{}|\\^~[]`<>#%";/?:@&=.
|
| FILTER_SANITIZE_NUMBER_INT | "number_int" | | |
Remove all characters except digits and +-.
|
| FILTER_SANITIZE_NUMBER_FLOAT | "number_float" | |
FILTER_FLAG_ALLOW_FRACTION,
FILTER_FLAG_ALLOW_THOUSAND,
FILTER_FLAG_ALLOW_SCIENTIFIC
|
Remove all characters except digits, +- and
optionally .,eE.
|
| FILTER_SANITIZE_MAGIC_QUOTES | "magic_quotes" | | | Apply addslashes(). |
| FILTER_CALLBACK | "callback" | | callback function or method | Call user-defined function to filter data. |
