#sudo apt-get install php-mysqlnd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package php-mysqlnd is a virtual package provided by:
php7.1-mysql 7.1.2-4+deb.sury.org~xenial+1
php5.6-mysql 5.6.30-7+deb.sury.org~xenial+1
php7.0-mysql 7.0.16-4+deb.sury.org~xenial+1
You should explicitly select one to install.
E: Package 'php-mysqlnd' has no installation candidate
任何人都可以帮助我，我如何解决这个问题？
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