filter-php-filters-php-flags-4

  • Types of filters

    • Filter flags

  • Filter flags

    • Filter flags

    Filter flags

    List of filter flags
    ID Used with Description
    FILTER_FLAG_STRIP_LOW FILTER_SANITIZE_ENCODED,
    FILTER_SANITIZE_SPECIAL_CHARS,
    FILTER_SANITIZE_STRING,
    FILTER_UNSAFE_RAW     		Strips characters that have a numerical value <32.
    FILTER_FLAG_STRIP_HIGH FILTER_SANITIZE_ENCODED,
    FILTER_SANITIZE_SPECIAL_CHARS,
    FILTER_SANITIZE_STRING,
    FILTER_UNSAFE_RAW     		Strips characters that have a numerical value >127.
    FILTER_FLAG_STRIP_BACKTICK FILTER_SANITIZE_ENCODED,
    FILTER_SANITIZE_SPECIAL_CHARS,
    FILTER_SANITIZE_STRING,
    FILTER_UNSAFE_RAW     		Strips backtick characters.
    FILTER_FLAG_ALLOW_FRACTION FILTER_SANITIZE_NUMBER_FLOAT Allows a period (.) as a fractional separator in
    numbers.
    FILTER_FLAG_ALLOW_THOUSAND FILTER_SANITIZE_NUMBER_FLOAT,
    FILTER_VALIDATE_FLOAT     		Allows a comma (,) as a thousands separator in
    numbers.
    FILTER_FLAG_ALLOW_SCIENTIFIC FILTER_SANITIZE_NUMBER_FLOAT Allows an e or E for scientific notation in
    numbers.
    FILTER_FLAG_NO_ENCODE_QUOTES FILTER_SANITIZE_STRING If this flag is present, single (‘) and double
    (“) quotes will not be encoded.
    FILTER_FLAG_ENCODE_LOW FILTER_SANITIZE_ENCODED,
    FILTER_SANITIZE_STRING,
    FILTER_SANITIZE_RAW     		Encodes all characters with a numerical value <32.
    FILTER_FLAG_ENCODE_HIGH FILTER_SANITIZE_ENCODED,
    FILTER_SANITIZE_SPECIAL_CHARS,
    FILTER_SANITIZE_STRING,
    FILTER_SANITIZE_RAW     		Encodes all characters with a numerical value >127.
    FILTER_FLAG_ENCODE_AMP FILTER_SANITIZE_STRING,
    FILTER_SANITIZE_RAW     		Encodes ampersands (&).
    FILTER_NULL_ON_FAILURE FILTER_VALIDATE_BOOLEAN Returns NULL for unrecognized
    boolean values.
    FILTER_FLAG_ALLOW_OCTAL FILTER_VALIDATE_INT Regards inputs starting with a zero (0) as octal
    numbers. This only allows the succeeding digits to be
    0-7.
    FILTER_FLAG_ALLOW_HEX FILTER_VALIDATE_INT Regards inputs starting with 0x or 0X as
    hexadecimal numbers. This only allows succeeding characters to be
    a-fA-F0-9.
    FILTER_FLAG_EMAIL_UNICODE FILTER_VALIDATE_EMAIL Allows the local part of the email address to contain Unicode
    characters.
    FILTER_FLAG_IPV4 FILTER_VALIDATE_IP Allows the IP address to be in IPv4 format.
    FILTER_FLAG_IPV6 FILTER_VALIDATE_IP Allows the IP address to be in IPv6 format.
    FILTER_FLAG_NO_PRIV_RANGE FILTER_VALIDATE_IP

    Fails validation for the following private IPv4
    ranges: 10.0.0.0/8, 172.16.0.0/12 and
    192.168.0.0/16.

    Fails validation for the IPv6 addresses starting
    with FD or FC.
    FILTER_FLAG_NO_RES_RANGE FILTER_VALIDATE_IP

    Fails validation for the following reserved IPv4
    ranges: 0.0.0.0/8, 169.254.0.0/16,
    127.0.0.0/8 and 240.0.0.0/4.

    Fails validation for the following reserved IPv6
    ranges: ::1/128, ::/128, ::ffff:0:0/96
    and fe80::/10.
    FILTER_FLAG_SCHEME_REQUIRED FILTER_VALIDATE_URL Requires the URL to contain a scheme
    part.
    FILTER_FLAG_HOST_REQUIRED FILTER_VALIDATE_URL Requires the URL to contain a host
    part.
    FILTER_FLAG_PATH_REQUIRED FILTER_VALIDATE_URL Requires the URL to contain a path
    part.
    FILTER_FLAG_QUERY_REQUIRED FILTER_VALIDATE_URL Requires the URL to contain a query
    string.
    FILTER_REQUIRE_SCALAR Requires the value to be scalar.
    FILTER_REQUIRE_ARRAY Requires the value to be an array.
    FILTER_FORCE_ARRAY If the value is a scalar, it is treated as array with the
    scalar value as only element.

    Changelog

    Version Description
    7.3.0 The explicit usage of
    FILTER_FLAG_SCHEME_REQUIRED and
    FILTER_FLAG_HOST_REQUIRED has been
    deprecated.
    7.1.0 FILTER_FLAG_EMAIL_UNICODE has
    been added.
    5.3.2 FILTER_FLAG_STRIP_BACKTICK has
    been added.
    5.2.10 FILTER_FLAG_NO_RES_RANGE supports
    also IPv6 addresses.