在Ubuntu 16.04升级之后,Apache将PHP文件呈现为文本.

Apache已安装并正在运行.
PHP7正在运行.当我执行以下命令时,我得到正确的输出：

php -r 'echo "\n\nYour PHP installation is working fine.\n\n\n";'

但是,当我访问http://localhost/info.php或任何其他PHP文件时,我得到文件内容而不是页面.

大多数在线帮助是针对Ubuntu和PHP的旧版本,所以我不确定它们是否可靠.

更新：
安装libapache2-mod-php7.0并启用php7.0后,Apache无法启动.见输出：

douglas@douglas-acer:~$sudo service apache2 restart
douglas@douglas-acer:~$sudo apt-get install libapache2-mod-php
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  libapache2-mod-php
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/2.960 B of archives.
After this operation, 15,4 kB of additional disk space will be used.
Selecting previously unselected package libapache2-mod-php.
(Reading database ... 263897 files and directories currently installed.)
Preparing to unpack .../libapache2-mod-php_1%3a7.0+35ubuntu6_all.deb ...
Unpacking libapache2-mod-php (1:7.0+35ubuntu6) ...
Setting up libapache2-mod-php (1:7.0+35ubuntu6) ...
douglas@douglas-acer:~$sudo service apache2 restart
douglas@douglas-acer:~$sudo a2enmod php7.0
Considering conflict php5 for php7.0:
Enabling module php7.0.
To activate the new configuration, you need to run:
  service apache2 restart
douglas@douglas-acer:~$sudo service apache2 restart
Job for apache2.service failed because the control process exited with error code. See "systemctl status apache2.service" and "journalctl -xe" for details.
douglas@douglas-acer:~$sudo apt-get purge php5
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'php5' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

systemctl status apache2.service的输出：

● apache2.service - LSB: Apache2 web server
   Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: failed (Result: exit-code) since Dom 2016-04-24 08:21:35 BRT; 14s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 9216 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE)

Abr 24 08:21:35 douglas-acer apache2[9216]:  * The apache2 configtest failed.
Abr 24 08:21:35 douglas-acer apache2[9216]: Output of config test was:
Abr 24 08:21:35 douglas-acer apache2[9216]: [Sun Apr 24 08:21:35.235583 2016] [:crit] [pid 9226:tid 140666367190912] Apache is running a threade
Abr 24 08:21:35 douglas-acer apache2[9216]: AH00013: Pre-configuration failed
Abr 24 08:21:35 douglas-acer apache2[9216]: Action 'configtest' failed.
Abr 24 08:21:35 douglas-acer apache2[9216]: The Apache error log may have more information.
Abr 24 08:21:35 douglas-acer systemd[1]: apache2.service: Control process exited, code=exited status=1
Abr 24 08:21:35 douglas-acer systemd[1]: Failed to start LSB: Apache2 web server.
Abr 24 08:21:35 douglas-acer systemd[1]: apache2.service: Unit entered failed state.
Abr 24 08:21:35 douglas-acer systemd[1]: apache2.service: Failed with result 'exit-code'.

journalctl -xe的输出

-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit apache2.service has finished shutting down.
Abr 24 08:37:59 douglas-acer systemd[1]: Starting LSB: Apache2 web server...
-- Subject: Unit apache2.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit apache2.service has begun starting up.
Abr 24 08:37:59 douglas-acer apache2[10261]:  * Starting Apache httpd web server apache2
Abr 24 08:37:59 douglas-acer apache2[10261]:  *
Abr 24 08:37:59 douglas-acer apache2[10261]:  * The apache2 configtest failed.
Abr 24 08:37:59 douglas-acer apache2[10261]: Output of config test was:
Abr 24 08:37:59 douglas-acer apache2[10261]: [Sun Apr 24 08:37:59.748900 2016] [:crit] [pid 10271:tid 139911432607616] Apache is running a threa
Abr 24 08:37:59 douglas-acer apache2[10261]: AH00013: Pre-configuration failed
Abr 24 08:37:59 douglas-acer apache2[10261]: Action 'configtest' failed.
Abr 24 08:37:59 douglas-acer apache2[10261]: The Apache error log may have more information.
Abr 24 08:37:59 douglas-acer systemd[1]: apache2.service: Control process exited, code=exited status=1
Abr 24 08:37:59 douglas-acer systemd[1]: Failed to start LSB: Apache2 web server.
-- Subject: Unit apache2.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit apache2.service has failed.
-- 
-- The result is failed.
Abr 24 08:37:59 douglas-acer systemd[1]: apache2.service: Unit entered failed state.
Abr 24 08:37:59 douglas-acer systemd[1]: apache2.service: Failed with result 'exit-code'.
Abr 24 08:37:59 douglas-acer sudo[10258]: pam_unix(sudo:session): session closed for user root
Abr 24 08:38:02 douglas-acer sudo[10276]:  douglas : TTY=pts/18 ; PWD=/home/douglas ; USER=root ; COMMAND=/bin/journalctl -xe
Abr 24 08:38:02 douglas-acer sudo[10276]: pam_unix(sudo:session): session opened for user root by (uid=0)
Abr 24 08:38:38 douglas-acer sudo[10276]: pam_unix(sudo:session): session closed for user root
Abr 24 08:39:01 douglas-acer CRON[10297]: pam_unix(cron:session): session opened for user root by (uid=0)
Abr 24 08:39:01 douglas-acer CRON[10299]: (root) CMD (  [ -x /usr/lib/php5/sessionclean ] && /usr/lib/php5/sessionclean)
Abr 24 08:39:01 douglas-acer CRON[10297]: pam_unix(cron:session): session closed for user root
Abr 24 08:39:01 douglas-acer CRON[10298]: pam_unix(cron:session): session opened for user root by (uid=0)
Abr 24 08:39:01 douglas-acer CRON[10300]: (root) CMD (  [ -x /usr/lib/php/sessionclean ] && /usr/lib/php/sessionclean)
Abr 24 08:39:02 douglas-acer CRON[10298]: pam_unix(cron:session): session closed for user root
Abr 24 08:39:51 douglas-acer sudo[10122]: pam_unix(sudo:session): session closed for user root
Abr 24 08:39:53 douglas-acer sudo[10368]:  douglas : TTY=pts/5 ; PWD=/home/douglas ; USER=root ; COMMAND=/bin/journalctl -xe
Abr 24 08:39:53 douglas-acer sudo[10368]: pam_unix(sudo:session): session opened for user root by (uid=0) 

关于错误Apache正在运行线程MPM,但您的PHP模块未编译为线程安全.你需要重新编译PHP我在https://wiki.archlinux.org/index.php/Apache_HTTP_Server找到了一些关于这个问题的帮助,但文件路径与Ubuntu中的文件路径不匹配,所以我没有尝试应用推荐的修复.

解决方法:

php命令由Ubuntu 16.04上的php7.0-cli包提供.运行CLI与Web服务器配置正交.

您需要安装和配置其中一个Web SAPI – apache2,fpm或cgi.最简单的是安装apache2 SAPI.

>要安装apache2 SAPI,请运行apt-get install libapache2-mod-php(这将拉出默认的PHP版本,目前为libapache2-mod-php7.0).该软件包应启用自身并切换到apache2 prefork MPM,这是唯一支持的MPM.如果没有,尝试运行a2enmod php7.0并查找错误.安装应该从事件MPM自动切换到prefork MPM,但如果没有,你可以通过sudo a2dismod mpm_event然后sudo a2enmod mpm_prefork手动切换它.
>要安装FPM SAPI,请运行apt-get install php-fpm,然后通过运行a2enconf php7.0-fpm启用FPM. FPM SAPI更安全,但更难配置.
>要安装CGI SAPI,请运行apt-get install php-cgi,然后通过运行a2enconf php7.0-cgi启用CGI.请注意,不建议使用CGI如何运行PHP,但在特殊部署中它可能会派上用场.