Zend_Locale_Format is a internal component used by Zend_Locale. All locale aware classes use Zend_Locale_Format for normalization and localization of numbers and dates. Normalization involves parsing input from a variety of data representations, like dates, into a standardized, structured representation, such as a PHP array with year, month, and day elements. The exact same string containing a number or a date might mean different things to people with different customs and conventions. Disambiguation of numbers and dates requires rules about how to interpret these strings and normalize the values into a standardized data structure. Thus, all methods in Zend_Locale_Format require a locale in order to parse the input data. If no locale is specified, then normalization and localization will use the standard "root" locale, which might yield unexpected behavior, if the input originated in a different locale, or output for a specific locale was expected. There are many number systems different from the common decimal system (e.g. "3.14"). Numbers can be normalized with the getNumber() function to obtain the standard decimal representation. for all number-related discussions in this manual, Arabic/European numerals (0,1,2,3,4,5,6,7,8,9) are implied, unless explicitly stated otherwise. The options array may contain a 'locale' to define grouping and decimal characters. The array may also have a 'precision' to truncate excess digits from the result. $locale, 'precision' => 3) ); print $number; // will return 13524.678 ]]> Since getNumber($value, array $options = array()) can normalize extremely large numbers, check the result carefully before using finite precision calculations, such as ordinary PHP math operations. For example, if ((string)int_val($number) != $number) { use BCMath or GMP . Most PHP installations support the BCMath extension. Also, the precision of the resulting decimal representation can be rounded to a desired length with getNumber() with the option 'precision'. If no precision is given, no rounding occurs. Use only PHP integers to specify the precision. If the resulting decimal representation should be truncated to a desired length instead of rounded the option 'number_format' can be used instead. Define the length of the decimal representation with the desired length of zeros. The result will then not be rounded. So if the defined precision within number_format is zero the value "1.6" will return "1", not "2. See the example nearby: 1, 'locale' => $locale) ); print $number; // will return 13524.7 $number = Zend_Locale_Format::getNumber('13.524,678', array('number_format' => '#.00', 'locale' => $locale) ); print $number; // will return 13524.67 ]]> toNumber($value, array $options = array()) can localize numbers to the following supported locales . This function will return a localized string of the given number in a conventional format for a specific locale. The 'number_format' option explicitly specifies a non-default number format for use with toNumber(). $locale)); // will return 13.547,36 print $number; ]]> toNumber() can localize numbers with unlimited length. It is not related to integer or float limitations. The same way as within getNumber(), toNumber() handles precision. If no precision is given, the complete localized number will be returned. 2, 'locale' => $locale)); // will return 13.547,37 print $number; ]]> Using the option 'number_format' a self defined format for generating a number can be defined. The format itself has to be given in CLDR format as described below. The locale is used to get separation, precision and other number formatting signs from it. German for example defines ',' as precision separation and in English the '.' sign is used. Token Description Example format Generated output #0 Generates a number without precision and separation #0 1234567 , Generates a separation with the length from separation to next separation or to 0 #,##0 1,234,567 #,##,##0 Generates a standard separation of 3 and all following separations with 2 #,##,##0 12,34,567 . Generates a precision #0.# 1234567.1234 0 Generates a precision with a defined length #0.00 1234567.12 '#,#0.00', 'locale' => 'de') ); // will return 1.35.47,36 print $number; $number = Zend_Locale_Format::toNumber(13547.3, array('number_format' => '#,##0.00', 'locale' => 'de') ); // will return 13.547,30 print $number; ]]> isNumber($value, array $options = array()) checks if a given string is a number and returns true or false. 'de_AT')) { print "Number"; } else { print "not a Number"; } ]]> Floating point values can be parsed with the getFloat($value, array $options = array()) function. A floating point value will be returned. 2, 'locale' => $locale) ); // will return 13524.68 print $number; ]]> toFloat() can localize floating point values. This function will return a localized string of the given number. 1, 'locale' => $locale) ); // will return 13.547,4 print $number; ]]> isFloat($value, array $options = array()) checks if a given string is a floating point value and returns true or false. $locale)) { print "float"; } else { print "not a float"; } ]]> Integer values can be parsed with the getInteger() function. A integer value will be returned. $locale)); // will return 13524 print $number; ]]> toInteger($value, array $options = array()) can localize integer values. This function will return a localized string of the given number. $locale)); // will return 13.547 print $number; ]]> isInteger($value, array $options = array()) checks if a given string is a integer value and returns true or false. $locale)) { print "integer"; } else { print "not a integer"; } ]]> Zend_Locale_Format::convertNumerals() converts digits between different numeral systems , including the standard Arabic/European/Latin numeral system (0,1,2,3,4,5,6,7,8,9), not to be confused with Eastern Arabic numerals sometimes used with the Arabic language to express numerals. Attempts to use an unsupported numeral system will result in an exception, to avoid accidentally performing an incorrect conversion due to a spelling error. All characters in the input, which are not numerals for the selected numeral system, are copied to the output with no conversion provided for unit separator characters. Zend_Locale* components rely on the data provided by CLDR (see their list of scripts grouped by language). In CLDR and hereafter, the Europena/Latin numerals will be referred to as "Latin" or by the assigned 4-letter code "Latn". Also, the CLDR refers to this numeral systems as "scripts". Suppose a web form collected a numeric input expressed using Eastern Arabic digits "١‎٠٠". Most software and PHP functions expect input using Arabic numerals. Fortunately, converting this input to its equivalent Latin numerals "100" requires little effort using convertNumerals($inputNumeralString, $sourceNumeralSystem, $destNumeralSystem) , which returns the $input with numerals in the script $sourceNumeralSystem converted to the script $destNumeralSystem. Similarly, any of the supported numeral systems may be converted to any other supported numeral system. For a list of supported numeral systems call Zend_Locale::getTranslationList('numberingsystem', 'en').