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composer-phpmbstring

Composer can not install dependencies

I have a FuelPhp project and i am trying to install dependencies via composer. When i ran composer install on command line, i get following error; 

 The requested PHP extension ext-mbstring ^0.0.0 has the wrong version (7.0.18) installed. Install or enable PHP's mbstring extension.

I have mbstring extension installed and enabled. Why composer complaining about ext-mbstring extension ?enter image description here

Composer Version:1.6.3 Php Version:7.0.18 OS:Windows 10

This is from composer.json

   "require": {
    "php": ">=5.3.3",
    "composer/installers": "~1.0",
    "fuel/docs": "dev-1.7/master",
    "fuel/core": "dev-1.7/master",
    "fuel/auth": "dev-1.7/master",
    "fuel/email": "dev-1.7/master",
    "fuel/oil": "dev-1.7/master",
    "fuel/orm": "dev-1.7/master",
    "fuel/parser": "dev-1.7/master",
    "trait-orm-format": "dev-master",
    "fuelphp/upload": "2.0.2",
    "monolog/monolog": "1.5.*",
    "michelf/php-markdown": "1.4.0",
    "ext-mbstring": "^0.0.0"
}
Solution

  • ^0.0.0 version constraint means Composer will not install anything beyond 0.0.* version.

    Use "ext-mbstring": "*" as version constraint and install should pass correctly.