我重新安linux mint18.1之后，安装的php变成了7.0版本，原先的微擎系统在php7.0+apache2.4的环境下，网页页面打开是空白页面，重新配置了apache的配置文件还是空白页面，查看error.log日志文件，内容如下：
[Wed Mar 29 08:03:44.299194 2017] [mpm_prefork:notice] [pid 4657] AH00169: caught SIGTERM, shutting down
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_bz2.dll' - /usr/lib/php/20151012/php_bz2.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_curl.dll' - /usr/lib/php/20151012/php_curl.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_gd2.dll' - /usr/lib/php/20151012/php_gd2.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_mbstring.dll' - /usr/lib/php/20151012/php_mbstring.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_mysqli.dll' - /usr/lib/php/20151012/php_mysqli.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_openssl.dll' - /usr/lib/php/20151012/php_openssl.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_firebird.dll' - /usr/lib/php/20151012/php_pdo_firebird.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_mysql.dll' - /usr/lib/php/20151012/php_pdo_mysql.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_oci.dll' - /usr/lib/php/20151012/php_pdo_oci.dll: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_pdo_odbc.dll' - /usr/lib/php/20151012/php_pdo_odbc.dll: cannot open shared object file: No such file or directory in Unknown on line 0
[Wed Mar 29 08:03:45.391389 2017] [mpm_prefork:notice] [pid 4795] AH00163: Apache/2.4.18 (Ubuntu) configured -- resuming normal operations
[Wed Mar 29 08:03:45.391442 2017] [core:notice] [pid 4795] AH00094: Command line: '/usr/sbin/apache2'
各位大神能不能帮忙看一下是什么问题导致的？我初次接触php，实在是一窍不通～～根据百度的几种解决办法尝试了，也还是没有解决。拜托了各位！！
