I18n with PHP 5.3

PHP Internationalization with ICU By Stas Malyshev, Zend Technologies

What and why?
ICU - http://icu-project.org/ (IBM)
Unicode
CLDR - http://cldr.unicode.org/

Intl extension
Locale
Collator
Number & Currency formatter
Date & Time formatter
Message & Choice formatter
Normalizer
Graphemes
IDN
Calendars
Resources

Intl extension
Dual API OO and procedural
Same implementation underneath
collator_create () == new Collator ()
numfmt_format () == NumberFormatter::format ()
locale_get_default () == Locale::getDefault ()

Locale
Relies on ICU locales
<language>[_<script>]_<country>[_<variant>][@<keywords>]
Default locale
new Collator(Locale::DEFAULT )
Locale::setDefault, Locale::getDefault
You can use null

Locale
Locale pieces
getPrimaryLanguage($locale)
getScript($locale)
getRegion($locale)
getVariant($locale)
getKeywords($locale)

Locale
Locale display pieces
getDisplayName($locale, $in_locale = null)
getDisplayLanguage($locale, $in_locale = null)
getDisplayScript($locale, $in_locale = null)
getDisplayRegion($locale, $in_locale = null)
Example:
getDisplayScript(getScript("zh-Hant-TW"), "en-US") returns “Traditional Chinese”

Locale building blocks
parseLocale () - returns array composed of locale subtags
composeLocale () - creates locale ID out of subtags
parseLocale('sr-Latn-RS') returns
array('language'=>'sr', 'script'=>'Latn', 'region'=>’RS’)
composeLocale(array('language'=>'sr', 'script'=>'Latn', 'region'=>’RS’)) returns ‘sr-Latn-RS ’

Locale guessing
acceptFromHttp - Accept-Language to locale
lookup – find in the list
filterMatches – are they the same?

Collator
Comparing, sorting strings
Collation level (strength)
All ICU collator attributes
Numeric collation
Ignoring punctuation
Not yet: custom “tailoring” rules

Collator
$coll = new Collator ( "fr_CA" );
if ( $coll -> compare ( "côte" , "coté" ) < 0 ) {
echo "less " ;
} else {
echo "greater " ;
}
côte < coté

Collator
$strings = array( "cote" , "côte" , "Côte" , "coté" , "Coté" , "côté" , "Côté" , "coter" );
$coll = new Collator ( "fr_CA" );
$coll -> sort ( $strings );
cote côte Côte coté Coté côté Côté coter sort($array, $flags) asort($array, $flags) sortWithSortKeys($array)

NumberFormatter
Formatting and parsing
Numbers and currency
numfmt_create($locale, $style, $pattern = null)
NumberFormatter::PATTERN_DECIMAL NumberFormatter::ORDINAL NumberFormatter::DECIMAL NumberFormatter::DURATION NumberFormatter::CURRENCY NumberFormatter::SCIENTIFIC NumberFormatter::PERCENT NumberFormatter::SPELLOUT

NumberFormatter
Formatting
$fmt = new NumberFormatter ( ‘en_US’ , NumberFormatter :: DECIMAL ); echo $fmt -> format ( 1234 ); // result is 1,234 $fmt = new NumberFormatter ( ‘de_CH’ , NumberFormatter :: DECIMAL ); echo $fmt -> format ( 1234 ); // result is 1'234

NumberFormatter
Parsing
$fmt = new NumberFormatter ( ‘de_DE’ , NumberFormatter :: DECIMAL ); $num = ‘1.234 , 567 min’ ; $fmt -> parse ( $num , NumberFormatter :: TYPE_DOUBLE , $pos ); // result is 1234.567 , $pos = 9 $fmt -> parse ( $num , NumberFormatter :: TYPE_INT32 ); // result is 1234

MessageFormatter
Formatting and parsing whole messages, including data inside
Also allows choice between things printed:
0≤are no files|1≤is one file|1<are many files

MessageFormatter $fmt = new MessageFormatter ( "en_US" , "{0,number,integer} monkeys on {1,number,integer} trees make {2,number} monkeys per tree" ); echo $fmt -> format (array( 4560 , 123 , 4560 / 123 )); $fmt = new MessageFormatter ( "de" , "{0,number,integer} Affen über {1,number,integer} Bäume um {2,number} Affen pro Baum" ); echo $fmt -> format (array( 4560 , 123 , 4560 / 123 ));

IntlDateFormatter
Allows using locale-dependent canned patterns
Short, medium, long date & time
Long: Tuesday, April 12, 1952 AD or 3:30:42pm PST
Medium: January 12, 1952 or 3:30:32pm
Short: 12/13/52 or 3:30pm
Also allows free-form patterns
"yyyy.MM.dd G 'at' HH:mm:ss vvvv"
1996.07.10 AD at 15:08:56 Pacific Time

IntlDateFormatter $fmt = new IntlDateFormatter ( "en_US" , IntlDateFormatter :: FULL , IntlDateFormatter :: FULL , 'America/Los_Angeles' , IntlDateFormatter :: GREGORIAN ); echo $fmt -> format ( 0 ); // Wednesday, December 31, 1969 4:00:00 PM PT $fmt = new IntlDateFormatter ( "de-DE" , IntlDateFormatter :: FULL , IntlDateFormatter :: FULL , 'America/Los_Angeles' , IntlDateFormatter :: GREGORIAN ); echo $fmt -> format ( 0 ); // Mittwoch, 31. Dezember 1969 16:00 Uhr GMT-08:00

Normalizer
Brings Unicode text to one of the normal forms: NFC, NFD, NFKC, NFKD
normalize(), isNormalized()
$combining_ring_above = "xCCx8A" ; // 'COMBINING RING ABOVE' (U+030A) $chars = Normalizer :: normalize ( 'A' . $combining_ring_above , Normalizer :: FORM_C ); echo urlencode ( $chars ); // %C3%85 i.e. // 'LATIN CAPITAL LETTER A WITH RING ABOVE' (U+00C5)

Grapheme functions
Graphemes are multi-char entities, like letter + accent mark(s)
Same as string functions, but operate on grapheme units
Strlen, substr, strpos, strstr
Extraction function – extract to fill limited buffer, but always keep graphemes whole

IDN
עברית .idn.icann.org ↔ xn--5dbqzzl.idn.icann.org
русский.idn.icann.org ↔ xn--h1acbxfam.idn.icann.org
idn_to_ascii
idn_to_utf8

TODO
ResourceHandler
Transliteration
StringSearch
Tighter integration with other modules in 6.0

Thanks!
http://php.net/intl for futher information.

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I18n with PHP 5.3

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