InputFilter

Extends \Joomla\Filter\InputFilter

InputFilter is a class for filtering input from any data source

Forked from the php input filter library by: Daniel Morris dan@rootcube.com Original Contributors: Gianpaolo Racca, Ghislain Picard, Marco Wandschneider, Chris Tobin and Andrew Eddie.

since

1.7.0

Methods

__construct

Constructor for InputFilter class.

__construct(array $tagsArray = array(), array $attrArray = array(), integer $tagsMethod = self::TAGS_WHITELIST, integer $attrMethod = self::ATTR_WHITELIST, integer $xssAuto = 1) 
since

1.0

Arguments

$tagsArray

arrayList of user-defined tags

$attrArray

arrayList of user-defined attributes

$tagsMethod

integerWhiteList method = 0, BlackList method = 1

$attrMethod

integerWhiteList method = 0, BlackList method = 1

$xssAuto

integerOnly auto clean essentials = 0, Allow clean blacklisted tags/attr = 1

_cleanAttributes

Internal method to strip a tag of certain attributes

_cleanAttributes(array $attrSet) : array
deprecated
since

1.7.0

deprecated

4.0 Use InputFilter::cleanAttributes() instead

Arguments

$attrSet

arrayArray of attribute pairs to filter

Response

arrayFiltered array of attribute pairs

_cleanTags

Internal method to strip a string of certain tags

_cleanTags(string $source) : string
deprecated
since

1.7.0

deprecated

4.0 Use InputFilter::cleanTags() instead

Arguments

$source

stringInput string to be 'cleaned'

Response

string'Cleaned' version of input parameter

_decode

Try to convert to plaintext

_decode(string $source) : string
deprecated
since

1.7.0

deprecated

4.0 Use InputFilter::decode() instead

Arguments

$source

stringThe source string.

Response

stringPlaintext string

_escapeAttributeValues

Escape < > and " inside attribute values

_escapeAttributeValues(string $source) : string
deprecated
since

1.7.0

deprecated

4.0 Use InputFilter::escapeAttributeValues() instead

Arguments

$source

stringThe source string.

Response

stringFiltered string

_remove

Internal method to iteratively remove all unwanted tags and attributes

_remove(string $source) : string
deprecated
since

1.7.0

deprecated

4.0 Use InputFilter::remove() instead

Arguments

$source

stringInput string to be 'cleaned'

Response

string'Cleaned' version of input parameter

_stripCSSExpressions

Remove CSS Expressions in the form of `:expression(.

_stripCSSExpressions(string $source) : string
deprecated

..)`

since

1.7.0

deprecated

4.0 Use InputFilter::stripCSSExpressions() instead

Arguments

$source

stringThe source string.

Response

stringFiltered string

checkAttribute

Function to determine if contents of an attribute are safe

checkAttribute(array $attrSubSet) : boolean
static
since

1.0

Arguments

$attrSubSet

arrayA 2 element array for attribute's name, value

Response

booleanTrue if bad code is detected

clean

Method to be called by another php script. Processes for XSS and specified bad code.

clean(mixed $source, string $type = 'string') : mixed
since

1.0

Arguments

$source

mixedInput string/array-of-string to be 'cleaned'

$type

stringThe return type for the variable: INT: An integer, or an array of integers, UINT: An unsigned integer, or an array of unsigned integers, FLOAT: A floating point number, or an array of floating point numbers, BOOLEAN: A boolean value, WORD: A string containing A-Z or underscores only (not case sensitive), ALNUM: A string containing A-Z or 0-9 only (not case sensitive), CMD: A string containing A-Z, 0-9, underscores, periods or hyphens (not case sensitive), BASE64: A string containing A-Z, 0-9, forward slashes, plus or equals (not case sensitive), STRING: A fully decoded and sanitised string (default), HTML: A sanitised string, ARRAY: An array, PATH: A sanitised file path, or an array of sanitised file paths, TRIM: A string trimmed from normal, non-breaking and multibyte spaces USERNAME: Do not use (use an application specific filter), RAW: The raw string is returned with no filtering, unknown: An unknown filter will act like STRING. If the input is an array it will return an array of fully decoded and sanitised strings.

Response

mixed'Cleaned' version of input parameter

cleanAttributes

Internal method to strip a tag of certain attributes

cleanAttributes(array $attrSet) : array
since

1.0

Arguments

$attrSet

arrayArray of attribute pairs to filter

Response

arrayFiltered array of attribute pairs

cleanTags

Internal method to strip a string of certain tags

cleanTags(string $source) : string
since

1.0

Arguments

$source

stringInput string to be 'cleaned'

Response

string'Cleaned' version of input parameter

decode

Try to convert to plaintext

decode(string $source) : string
deprecated
since

1.0

deprecated

This method will be removed once support for PHP 5.3 is discontinued.

Arguments

$source

stringThe source string.

Response

stringPlaintext string

decodeFileData

Method to decode a file data array.

decodeFileData(array $data) : array
static
since

3.4

Arguments

$data

arrayThe data array to decode.

Response

array

emailToPunycode

Function to punyencode utf8 mail when saving content

emailToPunycode(string $text) : string
since

3.5

Arguments

$text

stringThe strings to encode

Response

stringThe punyencoded mail

escapeAttributeValues

Escape < > and " inside attribute values

escapeAttributeValues(string $source) : string
since

1.0

Arguments

$source

stringThe source string.

Response

stringFiltered string

getInstance

Returns an input filter object, only creating it if it doesn't already exist.

getInstance(array $tagsArray = array(), array $attrArray = array(), integer $tagsMethod, integer $attrMethod, integer $xssAuto = 1, integer $stripUSC = -1) : \Joomla\CMS\Filter\InputFilter
static
since

1.7.0

Arguments

$tagsArray

arrayList of user-defined tags

$attrArray

arrayList of user-defined attributes

$tagsMethod

integerWhiteList method = 0, BlackList method = 1

$attrMethod

integerWhiteList method = 0, BlackList method = 1

$xssAuto

integerOnly auto clean essentials = 0, Allow clean blacklisted tags/attr = 1

$stripUSC

integerStrip 4-byte unicode characters = 1, no strip = 0, ask the database driver = -1

Response

\Joomla\CMS\Filter\InputFilterThe InputFilter object.

isSafeFile

Checks an uploaded for suspicious naming and potential PHP contents which could indicate a hacking attempt.

isSafeFile(array $file, array $options = array()) : boolean
static

The options you can define are: null_byte Prevent files with a null byte in their name (buffer overflow attack) forbidden_extensions Do not allow these strings anywhere in the file's extension php_tag_in_content Do not allow <?php tag in content phar_stub_in_content Do not allow the __HALT_COMPILER() phar stub in content shorttag_in_content Do not allow short tag <? in content shorttag_extensions Which file extensions to scan for short tags in content fobidden_ext_in_content Do not allow forbidden_extensions anywhere in content php_ext_content_extensions Which file extensions to scan for .php in content

This code is an adaptation and improvement of Admin Tools' UploadShield feature, relicensed and contributed by its author.

since

3.4

Arguments

$file

arrayAn uploaded file descriptor

$options

arrayThe scanner options (see the code for details)

Response

booleanTrue of the file is safe

remove

Internal method to iteratively remove all unwanted tags and attributes

remove(string $source) : string
since

1.0

Arguments

$source

stringInput string to be 'cleaned'

Response

string'Cleaned' version of input parameter

stripCssExpressions

Remove CSS Expressions in the form of :expression(.

stripCssExpressions(string $source) : string

..)

since

1.0

Arguments

$source

stringThe source string.

Response

stringFiltered string

stripUSC

Recursively strip Unicode Supplementary Characters from the source. Not: objects cannot be filtered.

stripUSC(mixed $source) : mixed
since

3.5

Arguments

$source

mixedThe data to filter

Response

mixedThe filtered result

Constants

TAGS_WHITELIST

Defines the InputFilter instance should use a whitelist method for sanitising tags.

since

1.3.0

TAGS_BLACKLIST

Defines the InputFilter instance should use a blacklist method for sanitising tags.

since

1.3.0

ATTR_WHITELIST

Defines the InputFilter instance should use a whitelist method for sanitising attributes.

since

1.3.0

ATTR_BLACKLIST

Defines the InputFilter instance should use a blacklist method for sanitising attributes.

since

1.3.0

Properties

stripUSC

A flag for Unicode Supplementary Characters (4-byte Unicode character) stripping.

since

3.5

Type(s)

integer

instances

A container for InputFilter instances.

static deprecated
since

1.0

deprecated

1.2.0

Type(s)

array<mixed,\Joomla\Filter\InputFilter>

tagsArray

The array of permitted tags (whitelist).

since

1.0

Type(s)

array

attrArray

The array of permitted tag attributes (whitelist).

since

1.0

Type(s)

array

tagsMethod

The method for sanitising tags

since

1.0

Type(s)

integer

attrMethod

The method for sanitising attributes

since

1.0

Type(s)

integer

xssAuto

A flag for XSS checks. Only auto clean essentials = 0, Allow clean blacklisted tags/attr = 1

since

1.0

Type(s)

integer

tagBlacklist

The list of the default blacklisted tags.

since

1.0

Type(s)

array

attrBlacklist

The list of the default blacklisted tag attributes. All event handlers implicit.

since

1.0

Type(s)

array

blacklistedChars

A special list of blacklisted chars

since

1.3.3

Type(s)

array