PHP Class Prado\I18N\core\ChoiceFormat

ChoiceFormat converts between ranges of numeric values and string names for those ranges. A ChoiceFormat splits the real number line -Inf to +Inf into two or more contiguous ranges. Each range is mapped to a string. ChoiceFormat is generally used in a MessageFormat for displaying grammatically correct plurals such as "There are 2 files."


$string = '[0] are no files |[1] is one file |(1,Inf] are {number} files';

 $formatter = new MessageFormat(...); //init for a source
$translated = $formatter->format($string);

 $choice = new ChoiceFormat();
	echo $choice->format($translated, 0); //shows "are no files"

The message/string choices are separated by the pipe "|" followed by a set notation of the form # [1,2] -- accepts values between 1 and 2, inclusive. # (1,2) -- accepts values between 1 and 2, excluding 1 and 2. # {1,2,3,4} -- only values defined in the set are accepted. # [-Inf,0) -- accepts value greater or equal to negative infinity and strictly less than 0 Any non-empty combinations of the delimiters of square and round brackets are acceptable. Since version 3.1.2 the following set notation is also possible. # {n: n % 10 > 1 && n % 10 < 5} -- matches numbers like 2, 3, 4, 22, 23, 24 Where set is defined by the expression after n:. In particular, the expression accepts the following mathematical/logical operators to form a set of logical conditions on the value given by n: # < -- less than. # <= -- less than equals. # > -- greater than. # >= -- greater than equals. # == -- of equal value. # % -- modulo, e.g., 1 % 10 equals 1, 11 % 10 equals 1. # - -- minus, negative. # + -- addition. # & -- conditional AND. # && -- condition AND with short circuit. # | -- conditional OR. # || -- conditional OR with short circuit. # ! -- negation. Additional round brackets can also be used to perform grouping.

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Protected Properties

Property	Type	Description
$inf	float	The value for positive infinity.
$parse	string	The pattern to parse the formatting string.
$validate	string	The pattern to validate a set notation

Public Methods

Method	Description
__construct ( )	Constructor.
format ( $string, $number ) : string	For the choice string, and a number, find and return the string that satisfied the set within the choices.
isValid ( $number, $set ) : boolean	Determine if the given number belongs to a given set
parse ( $string ) : array	Parse a choice string and get a list of sets and a list of strings corresponding to the sets.

Protected Methods

Method	Description
isValidSetNotation ( $number, $set )

Method Details

__construct() public method

Constructor.

public __construct ( )

format() public method

For the choice string, and a number, find and return the string that satisfied the set within the choices.

public format ( $string, $number ) : string
return	string	the choosen string.

isValid() public method

Determine if the given number belongs to a given set

public isValid ( $number, $set ) : boolean
return	boolean	true if number is in the set, false otherwise.

isValidSetNotation() protected method

protected isValidSetNotation ( $number, $set )

parse() public method

Parse a choice string and get a list of sets and a list of strings corresponding to the sets.

public parse ( $string ) : array
return	array	array($sets, $strings)

Property Details

$inf protected_oe property

The value for positive infinity.

protected float $inf
return	float

$parse protected_oe property

The pattern to parse the formatting string.

protected string $parse
return	string

$validate protected_oe property

The pattern to validate a set notation

protected string $validate
return	string