Это расширение входит в стандартную поставку начиная с PHP 5.3.0. С PHP 5.2.0 можно использовать расширение PECL. Другими словами - есть два пути установки расширения.

Информация по установке этого расширения PECL может быть найдена в главе руководства Установка PECL расширений. Дополнительная информация, такая как новые версии, скачивание, исходные файлы, информация о разработчике и CHANGELOG, может быть найдена здесь: » http://pecl.php.net/package/intl.

Для разрешения встроенной версии расширения используйте --enable-intl при компиляцииPHP.

Если ICU установлен в нестандартную директорию, то ее необходимо указать в переменной окружения LD_LIBRARY_PATH, чтобы динамический линковщик смог его найти:

$ export LD_LIBRARY_PATH=/opt/icu/lib

В противном случае, если ICU установлен в стандартную директорию, то никаких дополнительных действий не требуется.

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User Contributed Notes 10 notes

hello at scottgruber dot me
2 years ago
For php7 on Ubuntu

sudo apt-get install php7.0-intl
jonwebb at tecbiz dot eu
4 years ago
On windows servers, open your php.ini (which should be in Program Files/PHP), and simply uncomment the extension.
Restart IIS Webserver - done.
jltupac at hotmail dot com
5 years ago
sudo apt-get install php5-intl
27 days ago
For windows I had to uncomment extension=intl in the php.ini
daniel at danielphenry dot com
3 years ago
To install on windows uncommenting the dll in php.ini is not enough you also need to include several other libraries in your system path (not user path). Found these details here: http://stackoverflow.com/a/6086991/819883
ahmedelnaa2010 at gmail dot com
2 years ago
- open your php.ini file    c:/xampp/php/php.ini or search how to find it, it's up to your server.
- find for ;extension=php_intl.dll
- remove the comment ;
- restart the apache
- then it's working :)

i used the same when i have problem in any extensions, open php.ini then search for the extension then remove the comment.
nirbhabbarat at gmail dot com
3 years ago
OS : CentOS 5.10
PHP : 5.5.12
We tried installing via *pecl install intl* , but we were getting below warning in php error logs

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20121212/intl.so' - /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.9' not found (required by /usr/local/lib/libicuio.so.55) in Unknown on line 0

Later we tried icu source from http://site.icu-project.org/download
Compile ICU ./configure --prefix=/opt/icu && make && make install

And post which we compiled PHP via source with following configurations:
5 years ago
On Fedora 18 "pecl install intl" wasn't working after "yum -y install icu" so I had to run "yum -y install php-intl" instead
5 years ago
You need to install the library.

yum install libicu-devel

Will get it working with "pecl install intl"
7 years ago
I'm running on Mac OS X using a MacPorts install. According to this page, my vanilla version of PHP 5.3.5 from MacPorts should include the intl functions by default. As far as I can see from phpinfo(), the MacPorts version did not disable it. However, the functions aren't visible and don't work.

It seems to require an additional:

sudo port install php5-intl

After which everything bursts into life.
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