錯誤，同時通過github上

Question

問題安裝laravel安裝1

Installation request for laravel/framework v5.2.16 -> satisfiable by laravel/framework[v5.2.16]. 
laravel/framework v5.2.16 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system. 

要啓用擴展，驗證它們在這些.ini文件啓用：

/etc/php/7.0/cli/php.ini 
/etc/php/7.0/cli/conf.d/10mysqlnd.ini 
/etc/php/7.0/cli/conf.d/10opcache.ini 
/etc/php/7.0/cli/conf.d/10pdo.ini 
/etc/php/7.0/cli/conf.d/20calendar.ini 
/etc/php/7.0/cli/conf.d/20ctype.ini 
/etc/php/7.0/cli/conf.d/20exif.ini 
/etc/php/7.0/cli/conf.d/20fileinfo.ini 
/etc/php/7.0/cli/conf.d/20ftp.ini 
/etc/php/7.0/cli/conf.d/20gettext.ini 
/etc/php/7.0/cli/conf.d/20iconv.ini 
/etc/php/7.0/cli/conf.d/20json.ini 
/etc/php/7.0/cli/conf.d/20mysqli.ini 
/etc/php/7.0/cli/conf.d/20pdo_mysql.ini 
/etc/php/7.0/cli/conf.d/20phar.ini 
/etc/php/7.0/cli/conf.d/20posix.ini 
/etc/php/7.0/cli/conf.d/20readline.ini 
/etc/php/7.0/cli/conf.d/20shmop.ini 
/etc/php/7.0/cli/conf.d/20sockets.ini 
/etc/php/7.0/cli/conf.d/20sysvmsg.ini 
/etc/php/7.0/cli/conf.d/20sysvsem.ini 
/etc/php/7.0/cli/conf.d/20sysvshm.ini 
/etc/php/7.0/cli/conf.d/20tokenizer.ini 
/etc/php/7.0/cli/conf.d/20zlib.ini 

您還可以運行php --ini內部終端，看看哪些PHP在CLI模式下使用文件。

Answer 1

你需要用mbstring重新編譯php。 （在這個問題的範圍之外）

here's a php7 fork of mbstring