PHP警告：PHP启动：无法加载动态库＆＃39; /usr/lib/php/20151012/gd.so'

Question

这是我尝试安装MPDF/MPDF时出现的错误消息。

$ composer create-project mpdf/mpdf --prefer-dist
PHP Warning:  PHP Startup: Unable to load dynamic library 
'/usr/lib/php/20151012/gd.so' - /usr/lib/php/20151012/gd.so: cannot open
shared object file: No such file or directory in Unknown on line 0
You are running composer with xdebug enabled. This has a major impact on 
runtime performance. See https://getcomposer.org/xdebug

  

[作曲\下载\ TransportException]
      ＆＃34; https://packagist.org/packages.json＆＃34;无法下载文件：SSL
      代码1操作失败.OpenSSL错误消息：
      错误：140770FC：SSL例程：SSL23_GET_SERVER_HELLO：未知协议
      无法启用加密
      无法打开流：操作失败

我不知道该怎么做才能帮到我？

Answer 1

我认为这可以帮到你。 似乎你不是第一个遇到这个问题的人。^^ PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/gd.so' - /usr/lib/php/20151012/gd.so: