Php/docs/filter.filters.validate

• PHP Manual
• Types of filters
• Validate filters

Validate filters

Listing of filters for validation

ID	Name	Options	Flags	Description
FILTER_VALIDATE_BOOLEAN	"boolean"	default	FILTER_NULL_ON_FAILURE	Returns true for "1", "true", "on" and "yes". Returns false otherwise. If FILTER_NULL_ON_FAILURE is set, false is returned only for "0", "false", "off", "no", and "", and null is returned for all non-boolean values.
FILTER_VALIDATE_DOMAIN	"validate_domain"	default	FILTER_FLAG_HOSTNAME	Validates whether the domain name label lengths are valid. Validates domain names against RFC 1034, RFC 1035, RFC 952, RFC 1123, RFC 2732, RFC 2181, and RFC 1123. Optional flag FILTER_FLAG_HOSTNAME adds ability to specifically validate hostnames (they must start with an alphanumeric character and contain only alphanumerics or hyphens).
FILTER_VALIDATE_EMAIL	"validate_email"	default	FILTER_FLAG_EMAIL_UNICODE	Validates whether the value is a valid e-mail address. In general, this validates e-mail addresses against the syntax in RFC 822, with the exceptions that comments and whitespace folding and dotless domain names are not supported.
FILTER_VALIDATE_FLOAT	"float"	default, decimal, min_range, max_range	FILTER_FLAG_ALLOW_THOUSAND	Validates value as float, optionally from the specified range, and converts to float on success.
FILTER_VALIDATE_INT	"int"	default, min_range, max_range	FILTER_FLAG_ALLOW_OCTAL, FILTER_FLAG_ALLOW_HEX	Validates value as integer, optionally from the specified range, and converts to int on success.
FILTER_VALIDATE_IP	"validate_ip"	default	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_VALIDATE_MAC	"validate_mac_address"	default		Validates value as MAC address.
FILTER_VALIDATE_REGEXP	"validate_regexp"	default, regexp		Validates value against regexp, a Perl-compatible regular expression.
FILTER_VALIDATE_URL	"validate_url"	default	FILTER_FLAG_SCHEME_REQUIRED, FILTER_FLAG_HOST_REQUIRED, FILTER_FLAG_PATH_REQUIRED, FILTER_FLAG_QUERY_REQUIRED	Validates value as URL (according to » http://www.faqs.org/rfcs/rfc2396), optionally with required components. Beware a valid URL may not specify the HTTP protocol http:// so further validation may be required to determine the URL uses an expected protocol, e.g. ssh:// or mailto:. Note that the function will only find ASCII URLs to be valid; internationalized domain names (containing non-ASCII characters) will fail.

Note:

As of PHP 5.4.11, the numbers +0 and -0 validate as both integers as well as floats (using FILTER_VALIDATE_FLOAT and FILTER_VALIDATE_INT). Before PHP 5.4.11 they only validated as floats (using FILTER_VALIDATE_FLOAT).

When default is set to option, default's value is used if value is not validated.

更新日志

版本	说明
7.4.0	Added min_range and max_range options for FILTER_VALIDATE_FLOAT.
7.0.0	Added FILTER_FLAG_HOSTNAME
5.5.0	Added FILTER_VALIDATE_MAC
5.2.1	FILTER_VALIDATE_URL now implicitly uses FILTER_FLAG_SCHEME_REQUIRED and FILTER_FLAG_HOST_REQUIRED.