在我工作的 ubuntu 12.04 服务器上，我使用以下命令安装了 php 的 curl 扩展：
apt-get install curl
apt-get install php5-curl
service apache2 restart
如果我请求一些 .php 页面，则在执行该 php 停止工作后
，firefox 会尝试下载文件而不是运行脚本
，经过一些研究后，我发现目录下/etc/apache2/mods-enabled/缺少文件的链接：
/etc/apache2/mods-available/php5.conf
/etc/apache2/mods-available/php5.load
所以我运行了命令a2enmod php5并创建了链接，
但是当我吃午饭时service apache2 restart它失败
了，/var/log/apache2/error.log我发现一些行如下：
PHP Warning: PHP Stratup: Unable to load dynamic library '/usr/lib/php5/20100525/pdo.so' - /usr/lib/php5/20100525/pdo.so: cannot open shared object file: No such file or directory in Unknown on line 0
对于各种 esttensions。
我已经验证该目录/usr/lib/php5/20100525/不再存在，
但我找到了/usr/lib/php5/20121212/包含 .so 文件
的目录我还看到该目录/etc/php5/conf.d是空的，没有链接，但所有 .ini 文件都在/etc/php5/mods-available
我的问题是：为什么更新会产生所有这些问题？
我该如何解决？解决方案可以将参考从更改/usr/lib/php5/20100525/为/usr/lib/php5/20121212/？我在哪里可以做到这一点？
感谢您的帮助，对不起我的英语
更新
我已经按照 seb 的建议创建了链接
ln -s /usr/lib/php5/20121212/ /usr/lib/php5/20100525
但是当我重新启动 apache 它失败并出现错误：
apache2: Syntax error on line 210 of /etc/apache/apache2.conf:
Syntax error on line 1 of /etc/apache2/mods-enabled/php5.load:
Cannot load /usr/lib/apache2/modules/libphp5.so into server:
/usr/lib/apache2/modules/libphp5.so:
cannot open shared object file: No such file or directory
重新安装php可以解决问题吗？如果是的话，我该怎么做？再次感谢
经过几次不成功的尝试后更新
，我从快照中恢复了虚拟机，并使用 aptitude 解决了问题。
aptitude install php5-curl
The following NEW packages will be installed:
libcurl3{a} libjson-c2{a} php5-curl php5-json{a}
The following packages will be upgraded:
php5-common
1 packages upgraded, 4 newly installed, 0 to remove and 130 not upgraded.
Need to get 722 kB of archives. After unpacking 820 kB will be used.
The following packages have unmet dependencies:
libapache2-mod-php5 : Dipende: php5-common (= 5.4.12-2~precise+1) but 5.5.3+dfsg 1+debphp.org~precise+2 is to be installed.
php5-gd : Dipende: php5-common (= 5.4.12-2~precise+1) but 5.5.3+dfsg-1+debphp.org~precise+2 is to be installed.
php5-mcrypt : Dipende: php5-common (= 5.4.12-2~precise+1) but 5.5.3+dfsg-1+debphp.org~precise+2 is to be installed.
php5-mysql : Dipende: php5-common (= 5.4.12-2~precise+1) but 5.5.3+dfsg-1+debphp.org~precise+2 is to be installed.
php5-cli : Dipende: php5-common (= 5.4.12-2~precise+1) but 5.5.3+dfsg-1+debphp.org~precise+2 is to be installed.
The following actions will resolve these dependencies:
Remove the following packages:
1) libapache2-mod-php5
2) php5
3) php5-cli
4) php5-gd
5) php5-mcrypt
6) php5-mysql
7) phpmyadmin
Leave the following dependencies unresolved:
8) libapache2-mod-php5 recommends php5-cli
Accept this solution? [Y/n/q/?] n
第一个解决方案我回答否
第二个建议的解决方案是
The following actions will resolve these dependencies:
Remove the following packages:
1) apache2.2-bin
2) apache2.2-common
Install the following packages:
3) apache2-bin [2.4.6-2~precise+1 (precise)]
4) apache2-data [2.4.6-2~precise+1 (precise)]
5) libgd3 [2.1.0-2~precise+1 (precise)]
6) liblua5.1-0 [5.1.4-12ubuntu1 (precise)]
7) libtiff4 [3.9.5-2ubuntu1.5 (precise-security, precise-updates)]
8) libvpx1 [1.0.0-1 (precise)]
9) php5-readline [5.5.3+dfsg-1+debphp.org~precise+2 (precise)]
Upgrade the following packages:
10) apache2 [2.2.22-1ubuntu1.2 (now) -> 2.4.6-2~precise+1 (precise)]
11) apache2-mpm-itk [2.2.22-1ubuntu1.2 (now) -> 2.4.6-2~precise+1 (precise)]
12) libapache2-mod-php5 [5.4.12-2~precise+1 (now) -> 5.5.3+dfsg-1+debphp.org~precise+2 (precise)]
13) libaprutil1 [1.3.12+dfsg-3 (now, precise) -> 1.5.2-1~precise+1 (precise)]
14) libaprutil1-dbd-sqlite3 [1.3.12+dfsg-3 (now, precise) -> 1.5.2-1~precise+1 (precise)]
15) libaprutil1-ldap [1.3.12+dfsg-3 (now, precise) -> 1.5.2-1~precise+1 (precise)]
16) php5-cli [5.4.12-2~precise+1 (now) -> 5.5.3+dfsg-1+debphp.org~precise+2 (precise)]
17) php5-gd [5.4.12-2~precise+1 (now) -> 5.5.3+dfsg-1+debphp.org~precise+2 (precise)]
18) php5-mcrypt [5.4.12-2~precise+1 (now) -> 5.5.3+dfsg-1+debphp.org~precise+2 (precise)]
19) php5-mysql [5.4.12-2~precise+1 (now) -> 5.5.3+dfsg-1+debphp.org~precise+2 (precise)]
Accept this solution? [Y/n/q/?] y
我接受了第二个解决方案并且安装成功，我只需要为 apache 2.4 调整虚拟主机的配置