Composer - the requested PHP extension mbstring is missing from your system [closed]

问题

I've recently tried to install package through Composer, but I have got an error the requested PHP extension mbstring is missing from your system. I removed semicolon from php.ini, but it still doesn't work. What should I do?

回答1:

sudo apt-get install php-mbstring

# if your are using php 7.1
sudo apt-get install php7.1-mbstring

# if your are using php 7.2
sudo apt-get install php7.2-mbstring

回答2:

1. find your php.ini
2. make sure the directive extension_dir=C:\path\to\server\php\ext is set and adjust the path (set your PHP extension dir)
3. make sure the directive extension=php_mbstring.dll is set (uncommented)

If this doesn't work and the php_mbstring.dll file is missing, then the PHP installation of this stack is simply broken.

回答3:

For php 7.1

sudo apt-get install php7.1-mbstring

Cheers!

回答4:

I set the PHPRC variable and uncommented zend_extension=php_opcache.dll in php.ini and all works well.

来源：https://stackoverflow.com/questions/32488917/composer-the-requested-php-extension-mbstring-is-missing-from-your-system