[composer-php] Composer: The requested PHP extension ext-intl * is missing from your system

I am trying to use composer.json file. but, when I am trying to run command 'composer install' in my path/project/, I am getting an error:

I have already configured my wamp for 'extension=php_intl.dll' and copied all icu*.dll in 'D:\wamp\bin\apache\apache2.2.22\bin' from 'D:\wamp\bin\php\php5.3.13' and it's showing in phpinfo():

without copy icu*.dll also works and showing in phpinfo();

Kindly, let me know if I have intl install on my wamp and composer install on my pc then why I am getting this error. really, it is so annoying.

Here is my details:

1. OS: windows 7 (64)
2. PHP: 5.3.13
3. Apache:2.2.22
4. Composer: installed by executable file
5. Pear: installed (latest)
6. PHPUnit: installed (latest)

My composer.json is as below:

{
    "name" : "sebastian/money",
    "description" : "Value Object that represents a monetary value (using a currency's smallest unit)",
    "keywords" : ["money"],
    "homepage" : "http://www.github.com/sebastianbergmann/money",
    "license" : "BSD-3-Clause",
    "authors" : [{
            "name" : "Sebastian Bergmann",
            "email" : "[email protected]"
        }
    ],
    "require" : {
        "php" : ">=5.3.3",
        "ext-intl" : "*"
    },
    "require-dev" : {
        "phpunit/phpunit" : "~4.0"
    },
    "autoload" : {
        "classmap" : [
            "src/"
        ]
    },
    "extra" : {
        "branch-alias" : {
            "dev-master" : "1.3.x-dev"
        }
    }
}

Let me know if any other details is required..

Any feedback/help would be highly appreciated.

I encountered this using it in Mac, resolved it by using --ignore-platform-reqs option.

composer install --ignore-platform-reqs

To enable intl extension follow the instructions below.

You need enable extension by uncommenting the following line extension=php_intl.dll in the C:\xampp\php\php.ini file. Once you uncomment the extension=php_intl.dll, then you must restart apache server using XAMPP control panel.

//about line 998
;extension=php_intl.dll 
change as
extension=php_intl.dll

(Note: php.ini file mostly in the following directory C:\xampp\php)

Restart xampp

For php.ini 5.6 version (check version using php -v)

;extension=php_intl.dll ; remove semicolon and keep like this extension=php_intl.dll

For php.ini 7.* version

;extension=intl ; remove semicolon and keep like this extension=intl

Note - After That Make Sure to Restart Your Xampp,Wamp Server in you Local Machine.

I have solved this problem by adding --ignore-platform-reqs command with composer install in ubuntu.

composer install --ignore-platform-reqs

If You have got this error while running composer install command, don't worry. Steps to be followed and requirements:

• Step1: Go to server folder such as xampp(or) wampp etc.
  
• Step2: open php folder inside that and go to ext folder.
  
• Step3: If you find a file named as php_intl.dll no problem.

Just go to php.ini file and uncomment the line

From:

;extension=php_intl.dll

To:

extension=php_intl.dll

• Step4: restart xampp, thats it

Note: If you don't find any of the file named as php_intl.dll, then you need to upgrade the PHP version.

just remove them

"ext-intl" : "*"

from your composer.json file.

Because sometimes for some helper functions, the IDE complains that the extension is missing from the composer.json file. Immediately press Alt+Enter to add it to the composer. But that doesn't mean that composer will count them in. The composer will complain next time while doing some operations. So that, we should not blindly type Alt+Enter rather than installing them manually in composer by doing composer install <package-name>.

As I think you have entered it manually, you should remove it, then install it in proper procedure composer install <package-name>

Or else you can run composer update to count that added dependencies in.

In latest XAMPP version; You need to find only intl(Line no 912)in php.ini file. Change ;extension=intl To extension=intl

In linux (Debian Jessie for example):

apt-get install php7.0-intl

will make the job to you due will create a simbolic link to it.

Just uncomment this line (to find it, simply search this line in editor):

;extension=php_sockets.dll

(Remove semicolon to uncomment)

For me, no need to restart XAMPP (in your case, WAMP). But if didn't work, restart it.

(with xampp server)open php.ini in ".\xampp\php"

change ;extension=intl to extension=intl

This is bit old question but I had faced same problem on linux base server while installing magento 2.

When I am firing composer update or composer install command from my magento root dir. Its was firing below error.

Problem 1
    - The requested PHP extension ext-intl * is missing from your system. Install or enable PHP's intl extension.
  Problem 2
    - The requested PHP extension ext-mbstring * is missing from your system. Install or enable PHP's mbstring extension.
  Problem 3
    - Installation request for pelago/emogrifier 0.1.1 -> satisfiable by pelago/emogrifier[v0.1.1].
    - pelago/emogrifier v0.1.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
   ...

Then, I searched for the available intl & intl extensions, using below commands.

yum list php*intl
yum install php-intl.x86_64  

yum list php*mbstring
yum install php-mbstring.x86_64

And it fixed the issue.