如何在PHP7中启用MySQLi扩展？

Question

我已经在Ubuntu14.04(信任的Tahr)上安装了PHP7和MySQL 5.5.47。

我已经使用以下方法检查了已安装的扩展：

sudo apt-cache search php7-*

它的产出如下：

php7.0-common - Common files for packages built from the PHP source
libapache2-mod-php7.0 - server-side, HTML-embedded scripting language (Apache 2 module)
php7.0-cgi - server-side, HTML-embedded scripting language (CGI binary)
php7.0-cli - command-line interpreter for the PHP scripting language
php7.0-phpdbg - server-side, HTML-embedded scripting language (PHPDBG binary)
php7.0-fpm - server-side, HTML-embedded scripting language (FPM-CGI binary)
libphp7.0-embed - HTML-embedded scripting language (Embedded SAPI library)
php7.0-dev - Files for PHP7.0 module development
php7.0-dbg - Debug symbols for PHP7.0
php7.0-curl - CURL module for PHP
php7.0-enchant - Enchant module for PHP
php7.0-gd - GD module for PHP
php7.0-gmp - GMP module for PHP
php7.0-imap - IMAP module for PHP
php7.0-interbase - Interbase module for PHP
php7.0-intl - Internationalisation module for PHP
php7.0-ldap - LDAP module for PHP
php7.0-mcrypt - libmcrypt module for PHP
php7.0-readline - readline module for PHP
php7.0-odbc - ODBC module for PHP
php7.0-pgsql - PostgreSQL module for PHP
php7.0-pspell - pspell module for PHP
php7.0-recode - recode module for PHP
php7.0-snmp - SNMP module for PHP
php7.0-tidy - tidy module for PHP
php7.0-xmlrpc - XMLRPC-EPI module for PHP
php7.0-xsl - XSL module for PHP
php7.0 - server-side, HTML-embedded scripting language (metapackage)
php7.0-json - JSON module for PHP
php-all-dev - package depending on all supported PHP development packages
php7.0-sybase - Sybase module for PHP
php7.0-sqlite3 - SQLite3 module for PHP
php7.0-mysql - MySQL module for PHP
php7.0-opcache - Zend OpCache module for PHP
php7.0-bz2 - bzip2 module for PHP

我也无法看到使用phpinfo()的MySQLi扩展。如何在PHP7中启用/安装MySQLi扩展？

这就是为什么我不能使用phpMyAdmin。上面写着“mysqli分机丢失了。”

Answer 1

我找到解决办法了。我能够在MySQLi中启用php.ini扩展。我只是在php.ini中取消了这一行的注释：

extension=php_mysqli.dll

现在，MySQLi工作得很好。下面是Apache2、PHP7和Ubuntu14.04环境中的php.ini文件路径：

/etc/php/7.0/apache2/php.ini

默认情况下，PHP7中禁用了MySQLi扩展。

Answer 2

问题是用来连接MySQL的包被废弃了(php5-mysql)。如果你安装了新的软件包，

sudo apt-get install php-mysql

这将自动更新Apache和PHP 7。

Answer 3

sudo phpenmod mysqli
sudo service apache2 restart

• phpenmod moduleName启用模块到PHP7(在此sudo service apache2 restart之后重新启动Apache )
• phpdismod moduleName禁用一个模块到PHP7(在此sudo service apache2 restart之后重新启动sudo service apache2 restart)
• php -m列出了加载的模块