diff --git a/reference/filter/configure.xml b/reference/filter/configure.xml
new file mode 100644
index 0000000000..f9174e4823
--- /dev/null
+++ b/reference/filter/configure.xml
@@ -0,0 +1,34 @@
+
+
+
+ &reftitle.install;
+
+ A short installation note: just type
+
+$ pear install filter
+
+ in your console.
+
+
+
+
+
diff --git a/reference/filter/constants.xml b/reference/filter/constants.xml
new file mode 100644
index 0000000000..a223b4f38f
--- /dev/null
+++ b/reference/filter/constants.xml
@@ -0,0 +1,537 @@
+
+
+
+
+ &reftitle.constants;
+ &extension.constants;
+
+
+
+ INPUT_POST
+ (integer)
+
+
+
+ POST variables.
+
+
+
+
+
+ INPUT_GET
+ (integer)
+
+
+
+ GET variables.
+
+
+
+
+
+ INPUT_COOKIE
+ (integer)
+
+
+
+ COOKIE variables.
+
+
+
+
+
+ INPUT_ENV
+ (integer)
+
+
+
+ ENV variables.
+
+
+
+
+
+ INPUT_SERVER
+ (integer)
+
+
+
+ SERVER variables.
+
+
+
+
+
+ INPUT_SESSION
+ (integer)
+
+
+
+ SESSION variables.
+
+
+
+
+
+ FILTER_FLAG_NONE
+ (integer)
+
+
+
+ No flags.
+
+
+
+
+
+ FILTER_VALIDATE_INT
+ (integer)
+
+
+
+ ID of "int" filter.
+
+
+
+
+
+ FILTER_VALIDATE_BOOLEAN
+ (integer)
+
+
+
+ ID of "boolean" filter.
+
+
+
+
+
+ FILTER_VALIDATE_FLOAT
+ (integer)
+
+
+
+ ID of "float" filter.
+
+
+
+
+
+ FILTER_VALIDATE_REGEXP
+ (integer)
+
+
+
+ ID of "validate_regexp" filter.
+
+
+
+
+
+ FILTER_VALIDATE_URL
+ (integer)
+
+
+
+ ID of "validate_url" filter.
+
+
+
+
+
+ FILTER_VALIDATE_EMAIL
+ (integer)
+
+
+
+ ID of "validate_email" filter.
+
+
+
+
+
+ FILTER_VALIDATE_IP
+ (integer)
+
+
+
+ ID of "validate_ip" filter.
+
+
+
+
+
+ FILTER_DEFAULT
+ (integer)
+
+
+
+ ID of default ("string") filter.
+
+
+
+
+
+ FILTER_UNSAFE_RAW
+ (integer)
+
+
+
+ ID of "unsafe_raw" filter.
+
+
+
+
+
+ FILTER_SANITIZE_STRING
+ (integer)
+
+
+
+ ID of "string" filter.
+
+
+
+
+
+ FILTER_SANITIZE_STRIPPED
+ (integer)
+
+
+
+ ID of "stripped" filter.
+
+
+
+
+
+ FILTER_SANITIZE_ENCODED
+ (integer)
+
+
+
+ ID of "encoded" filter.
+
+
+
+
+
+ FILTER_SANITIZE_SPECIAL_CHARS
+ (integer)
+
+
+
+ ID of "special_chars" filter.
+
+
+
+
+
+ FILTER_SANITIZE_EMAIL
+ (integer)
+
+
+
+ ID of "email" filter.
+
+
+
+
+
+ FILTER_SANITIZE_URL
+ (integer)
+
+
+
+ ID of "url" filter.
+
+
+
+
+
+ FILTER_SANITIZE_NUMBER_INT
+ (integer)
+
+
+
+ ID of "number_int" filter.
+
+
+
+
+
+ FILTER_SANITIZE_NUMBER_FLOAT
+ (integer)
+
+
+
+ ID of "number_float" filter.
+
+
+
+
+
+ FILTER_SANITIZE_MAGIC_QUOTES
+ (integer)
+
+
+
+ ID of "magic_quotes" filter.
+
+
+
+
+
+ FILTER_CALLBACK
+ (integer)
+
+
+
+ ID of "callback" filter.
+
+
+
+
+
+ FILTER_FLAG_ALLOW_OCTAL
+ (integer)
+
+
+
+ Allow octal notation (0[0-7]+) in "int" filter.
+
+
+
+
+
+ FILTER_FLAG_ALLOW_HEX
+ (integer)
+
+
+
+ Allow hex notation (0x[0-9a-fA-F]+) in "int" filter.
+
+
+
+
+
+ FILTER_FLAG_STRIP_LOW
+ (integer)
+
+
+
+ Strip characters with ASCII value less than 32.
+
+
+
+
+
+ FILTER_FLAG_STRIP_HIGH
+ (integer)
+
+
+
+ Strip characters with ASCII value greater than 127.
+
+
+
+
+
+ FILTER_FLAG_ENCODE_LOW
+ (integer)
+
+
+
+ Encode characters with ASCII value less than 32.
+
+
+
+
+
+ FILTER_FLAG_ENCODE_HIGH
+ (integer)
+
+
+
+ Encode characters with ASCII value greater than 127.
+
+
+
+
+
+ FILTER_FLAG_ENCODE_AMP
+ (integer)
+
+
+
+ Encode &.
+
+
+
+
+
+ FILTER_FLAG_NO_ENCODE_QUOTES
+ (integer)
+
+
+
+ Don't encode ' and ".
+
+
+
+
+
+ FILTER_FLAG_EMPTY_STRING_NULL
+ (integer)
+
+
+
+ (No use for now.)
+
+
+
+
+
+ FILTER_FLAG_ALLOW_FRACTION
+ (integer)
+
+
+
+ Allow fractional part in "number_float" filter.
+
+
+
+
+
+ FILTER_FLAG_ALLOW_THOUSAND
+ (integer)
+
+
+
+ Allow thousand separator (,) in "number_float" filter.
+
+
+
+
+
+ FILTER_FLAG_ALLOW_SCIENTIFIC
+ (integer)
+
+
+
+ Allow scientific notation (e, E) in
+ "number_float" filter.
+
+
+
+
+
+ FILTER_FLAG_SCHEME_REQUIRED
+ (integer)
+
+
+
+ Require scheme in "validate_url" filter.
+
+
+
+
+
+ FILTER_FLAG_HOST_REQUIRED
+ (integer)
+
+
+
+ Require host in "validate_url" filter.
+
+
+
+
+
+ FILTER_FLAG_PATH_REQUIRED
+ (integer)
+
+
+
+ Require path in "validate_url" filter.
+
+
+
+
+
+ FILTER_FLAG_QUERY_REQUIRED
+ (integer)
+
+
+
+ Require query in "validate_url" filter.
+
+
+
+
+
+ FILTER_FLAG_IPV4
+ (integer)
+
+
+
+ Allow only IPv4 address in "validate_ip" filter.
+
+
+
+
+
+ FILTER_FLAG_IPV6
+ (integer)
+
+
+
+ Allow only IPv6 address in "validate_ip" filter.
+
+
+
+
+
+ FILTER_FLAG_NO_RES_RANGE
+ (integer)
+
+
+
+ Deny reserved addresses in "validate_ip" filter.
+
+
+
+
+
+ FILTER_FLAG_NO_PRIV_RANGE
+ (integer)
+
+
+
+ Deny private addresses in "validate_ip" filter.
+
+
+
+
+
+
+
diff --git a/reference/filter/functions/filter-data.xml b/reference/filter/functions/filter-data.xml
new file mode 100644
index 0000000000..9ef1e46f54
--- /dev/null
+++ b/reference/filter/functions/filter-data.xml
@@ -0,0 +1,126 @@
+
+
+
+
+
+ filter_data
+ Filters data with a specified filter
+
+
+ &reftitle.description;
+
+ mixedfilter_data
+ mixedvariable
+ intfilter
+ mixedfilter_options
+ stringcharset
+
+
+ &warn.experimental.func;
+
+
+
+ &reftitle.parameters;
+
+
+
+ variable
+
+
+ Value to filter, arrays are filtered resursivelly.
+
+
+
+
+ filter
+
+
+ ID of a filter to use.
+
+
+
+
+ filter_options
+
+
+ Associative array of options or bitwise disjunction of flags. If filter
+ accepts options, flags can be provided in "flags" field of array. For
+ the "callback" filter, callback type should be passed.
+
+
+
+
+ charset
+
+
+ Character set used for filtering. Currently no filter uses this
+ parameter.
+
+
+
+
+
+
+
+ &reftitle.returnvalues;
+
+ Returns filtered data or &null; if filter fails.
+
+
+
+
+ &reftitle.examples;
+
+
+ A <function>filter_data</function> example
+
+
+]]>
+
+ &example.outputs;
+
+
+
+
+
+
+
+
+ &reftitle.seealso;
+
+
+ input_get
+ &seealso.callback;
+
+
+
+
+
+
+
diff --git a/reference/filter/functions/input-filters-list.xml b/reference/filter/functions/input-filters-list.xml
new file mode 100644
index 0000000000..4de03e7e17
--- /dev/null
+++ b/reference/filter/functions/input-filters-list.xml
@@ -0,0 +1,96 @@
+
+
+
+
+
+ input_filters_list
+ Returns a list of all supported filters
+
+
+ &reftitle.description;
+
+ arrayinput_filters_list
+
+
+
+ &warn.experimental.func;
+
+
+
+ &reftitle.parameters;
+
+
+
+
+ &reftitle.returnvalues;
+
+ Returns an array of names of all supported filters, empty array if there
+ are no such filters. Indexes of this array are not filter IDs, they can be
+ obtained with input_name_to_filter from a name instead.
+
+
+
+
+ &reftitle.examples;
+
+
+ A <function>input_filters_list</function> example
+
+
+]]>
+
+ &example.outputs.similar;
+
+ int
+ [1] => boolean
+ [2] => float
+ [3] => validate_regexp
+ [4] => validate_url
+ [5] => validate_email
+ [6] => validate_ip
+ [7] => string
+ [8] => stripped
+ [9] => encoded
+ [10] => special_chars
+ [11] => unsafe_raw
+ [12] => email
+ [13] => url
+ [14] => number_int
+ [15] => number_float
+ [16] => magic_quotes
+ [17] => callback
+)
+]]>
+
+
+
+
+
+
+
+
diff --git a/reference/filter/functions/input-get.xml b/reference/filter/functions/input-get.xml
new file mode 100644
index 0000000000..7befd8ff95
--- /dev/null
+++ b/reference/filter/functions/input-get.xml
@@ -0,0 +1,139 @@
+
+
+
+
+
+ input_get
+ Gets variable from outside PHP and optionally filters it
+
+
+ &reftitle.description;
+
+ mixedinput_get
+ inttype
+ stringvariable_name
+ intfilter
+ mixedflags
+ stringcharset
+
+
+ &warn.experimental.func;
+
+
+
+ &reftitle.parameters;
+
+
+
+ type
+
+
+ One of INPUT_GET, INPUT_POST,
+ INPUT_COOKIE, INPUT_SERVER,
+ INPUT_ENV, INPUT_SESSION (not
+ implemented yet) and 99 (serves for REQUEST for now).
+
+
+
+
+ variable_name
+
+
+ Name of a variable to get.
+
+
+
+
+ filter
+
+
+ Filter to apply.
+
+
+
+
+ flags
+
+
+ Associative array of options or bitwise disjunction of flags. If filter
+ accepts options, flags can be provided in "flags" field of array.
+
+
+
+
+ charset
+
+
+ Character set used for filtering. Currently no filter uses this
+ parameter.
+
+
+
+
+
+
+
+ &reftitle.returnvalues;
+
+ Value of the requested variable on success or &false; if variable has not
+ been found.
+
+
+
+
+ &reftitle.examples;
+
+
+ A <function>input_get</function> example
+
+Search again.";
+?>
+]]>
+
+ &example.outputs.similar;
+
+Search again.
+]]>
+
+
+
+
+
+
+ &reftitle.seealso;
+
+
+ filter_data
+
+
+
+
+
+
+
diff --git a/reference/filter/functions/input-has-variable.xml b/reference/filter/functions/input-has-variable.xml
new file mode 100644
index 0000000000..b3b382afd5
--- /dev/null
+++ b/reference/filter/functions/input-has-variable.xml
@@ -0,0 +1,73 @@
+
+
+
+
+
+ input_has_variable
+ Checks if variable of specified type exists
+
+
+ &reftitle.description;
+
+ boolinput_has_variable
+ inttype
+ stringvariable_name
+
+
+ &warn.experimental.func;
+
+
+
+ &reftitle.parameters;
+
+
+
+ type
+
+
+ One of INPUT_GET, INPUT_POST,
+ INPUT_COOKIE, INPUT_SERVER,
+ INPUT_ENV.
+
+
+
+
+ variable_name
+
+
+ Name of a variable to check.
+
+
+
+
+
+
+
+ &reftitle.returnvalues;
+
+ &return.success;
+
+
+
+
+
+
diff --git a/reference/filter/functions/input-name-to-filter.xml b/reference/filter/functions/input-name-to-filter.xml
new file mode 100644
index 0000000000..9eb9bdb79c
--- /dev/null
+++ b/reference/filter/functions/input-name-to-filter.xml
@@ -0,0 +1,71 @@
+
+
+
+
+
+ input_name_to_filter
+ Returns the filter ID belonging to a named filter
+
+
+ &reftitle.description;
+
+ intinput_name_to_filter
+ stringfiltername
+
+
+ &warn.experimental.func;
+
+
+
+ &reftitle.parameters;
+
+
+
+ filtername
+
+
+ Name of a filter to get.
+
+
+
+
+
+
+
+ &reftitle.returnvalues;
+
+ ID of a filter on success or &null; if filter doesn't exist.
+
+
+
+
+ &reftitle.seealso;
+
+
+ input_filters_list
+
+
+
+
+
+
+
diff --git a/reference/filter/ini.xml b/reference/filter/ini.xml
new file mode 100644
index 0000000000..e833b3f09a
--- /dev/null
+++ b/reference/filter/ini.xml
@@ -0,0 +1,88 @@
+
+
+
+ &reftitle.runtime;
+ &extension.runtime;
+
+
+ Filter Configuration Options
+
+
+
+ Name
+ Default
+ Changeable
+ Changelog
+
+
+
+
+ filter.default
+ string
+ PHP_INI_ALL
+
+
+
+ filter.default-flags
+
+ PHP_INI_ALL
+
+
+
+
+
+ &ini.php.constants;
+
+
+&ini.descriptions.title;
+
+
+
+
+
+ filter.default
+ string
+
+
+
+ Filter all GET, POST, COOKIE (and REQUEST) data by this filter.
+
+
+
+
+
+
+ filter.default_flags
+ integer
+
+
+
+ Default flags for filter_data.
+
+
+
+
+
+
+
+
+
diff --git a/reference/filter/reference.xml b/reference/filter/reference.xml
new file mode 100644
index 0000000000..3e586599aa
--- /dev/null
+++ b/reference/filter/reference.xml
@@ -0,0 +1,265 @@
+
+
+
+
+
+
+ Filter Functions
+ Filter
+
+
+
+ &reftitle.intro;
+
+ This extension serves for validating and filtering data coming usually
+ from some insecure source such as user input.
+
+ &warn.experimental;
+
+ Following filters currently exist:
+
+ Existing filters
+
+
+
+ ID
+ Name
+ Options
+ Flags
+ Description
+
+
+
+
+ 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.
+
+
+ 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
+
+
+
+ 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.
+
+
+
+
+
+
+
+ &reftitle.required;
+ &no.requirement;
+
+
+ &reference.filter.configure;
+ &reference.filter.ini;
+
+
+ &reftitle.resources;
+ &no.resource;
+
+ &reference.filter.constants;
+
+ &reference.filter.functions;
+
+
+