PHP 警告 : PHP Startup: Unable to load dynamic library 'pdo_mysql.so'

Question

我运行了命令:

php -v

输出:

PHP Warning:  PHP Startup: Unable to load dynamic library 'pdo_mysql.so' (tried: /usr/lib/php/20170718/pdo_mysql.so (/usr/lib/php/20170718/pdo_mysql.so: undefined symbol: mysqlnd_allocator), /usr/lib/php/20170718/pdo_mysql.so.so (/usr/lib/php/20170718/pdo_mysql.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0

我运行了这个命令:

php -m

输出:

PHP Warning:  PHP Startup: Unable to load dynamic library 'pdo_mysql.so' (tried: /usr/lib/php/20170718/pdo_mysql.so (/usr/lib/php/20170718/pdo_mysql.so: undefined symbol: mysqlnd_allocator), /usr/lib/php/20170718/pdo_mysql.so.so (/usr/lib/php/20170718/pdo_mysql.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
    [PHP Modules]
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    [Zend Modules]
    Zend OPcache

php.ini 文件包含这一行:

extension=pdo_mysql

运行这个命令:

sudo apt-get install -y php-pdo-mysql

什么都没有安装，因为它已经安装了。

运行这个命令:

php -i

输出显示:

PDO

PDO support => enabled
PDO drivers =>

不知道为什么会这样或该怎么做。有什么建议？

Answer 1

我是这样解决问题的:sudo apt-get --purge remove php-commonsudo apt-get install php-common php-mysql php-cli现在没有错误和php -m显示它拥有一切: