Validate filters

    Listing of filters for validation
    IDNameOptionsFlagsDescription
    FILTER_VALIDATE_BOOLEAN, FILTER_VALIDATE_BOOL"boolean"defaultFILTER_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.

    String values are trimmed using trim() before comparison.

    FILTER_VALIDATE_DOMAIN"validate_domain"defaultFILTER_FLAG_HOSTNAME, FILTER_NULL_ON_FAILURE

    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"defaultFILTER_FLAG_EMAIL_UNICODE, FILTER_NULL_ON_FAILURE

    Validates whether the value is a valid e-mail address.

    In general, this validates e-mail addresses against the addr-specsyntax 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_rangeFILTER_FLAG_ALLOW_THOUSAND, FILTER_NULL_ON_FAILURE

    Validates value as float, optionally from the specified range, and converts to float on success.

    String values are trimmed using trim() before comparison.

    FILTER_VALIDATE_INT"int"default, min_range, max_rangeFILTER_FLAG_ALLOW_OCTAL, FILTER_FLAG_ALLOW_HEX, FILTER_NULL_ON_FAILURE

    Validates value as integer, optionally from the specified range, and converts to int on success.

    String values are trimmed using trim() before comparison.

    FILTER_VALIDATE_IP"validate_ip"defaultFILTER_FLAG_IPV4, FILTER_FLAG_IPV6, FILTER_FLAG_NO_PRIV_RANGE, FILTER_FLAG_NO_RES_RANGE, FILTER_FLAG_GLOBAL_RANGE, FILTER_NULL_ON_FAILURE Validates value as IP address, optionally only IPv4 or IPv6 or not from private or reserved ranges.
    FILTER_VALIDATE_MAC"validate_mac_address"defaultFILTER_NULL_ON_FAILUREValidates value as MAC address.
    FILTER_VALIDATE_REGEXP"validate_regexp"default, regexpFILTER_NULL_ON_FAILURE Validates value against regexp, a Perl-compatible regular expression.
    FILTER_VALIDATE_URL"validate_url"defaultFILTER_FLAG_SCHEME_REQUIRED, FILTER_FLAG_HOST_REQUIRED, FILTER_FLAG_PATH_REQUIRED, FILTER_FLAG_QUERY_REQUIRED, FILTER_NULL_ON_FAILUREValidates 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:

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

    Changelog

    VersionDescription
    8.0.0 The FILTER_FLAG_SCHEME_REQUIRED and FILTER_FLAG_HOST_REQUIRED flags for the FILTER_VALIDATE_URL filter have been removed. The scheme and host are (and have been) always required.
    8.0.0 Added FILTER_VALIDATE_BOOL as an alias for FILTER_VALIDATE_BOOLEAN. Using FILTER_VALIDATE_BOOL is preferred.
    7.4.0 Added min_range and max_range options for FILTER_VALIDATE_FLOAT.
    7.0.0 Added FILTER_FLAG_HOSTNAME and FILTER_VALIDATE_DOMAIN.
    To Top