如何检查 Ubuntu 12.04 LTS 上是否安装了多个版本的 PHP？

Question

How to know if I have both php5.3 and php5.5 installed in my system? How to delete php5.3 if it is there and configuring Apache2 to work with php5.5?

Answer 1

I use the following command to view installed PHP versions in Ubuntu:

sudo update-alternatives --list php

Second way go to php directory where all PHP version configuration file stored:

cd /etc/php 
dir 

Output:

 > 5.6  7.0  7.1

Answer 2

Since you have a Linux environment, you can run this on your console:

locate bin/php

And then for anything that looks like a PHP binary, get the version. The output for me for the above is:

/home/xx/Development/Personal/Project1/webapp/bin/phpunit
/home/xx/Development/Personal/Project1/webapp-backup/vendor/bin/phpunit
/home/xx/Development/Personal/Project2/app/vendor/bin/phpunit
/home/xx/php-threaded/bin/php
/home/xx/php-threaded/bin/php-cgi
/home/xx/php-threaded/bin/php-config
/home/xx/php-threaded/bin/phpize
/usr/bin/php
/usr/bin/php5
/usr/local/bin/php-cgi
/usr/local/bin/php-config
/usr/local/bin/php53
/usr/local/bin/phpize
/usr/sbin/php5dismod
/usr/sbin/php5enmod
/usr/sbin/php5query

Out of those, there are a few that look like PHP binaries. So let's get the version for each:

/home/xx/php-threaded/bin/php -v
/usr/bin/php -v
/usr/bin/php5 -v
/usr/local/bin/php53 -v

That will give you the versions of PHP you have installed.

I wouldn't bother deleting an old version, it might remove files that will stop things working. You can just configure the console version, or the Apache version, to use the version you want.

---

In answer to your supplementary question: it seems that you've followed the instructions here to add an unofficial repo to your version of Ubuntu, since the standard repo does not support 5.5.

We discovered together that the way to get it working was first to upgrade Apache from 2.2 to 2.4:

sudo apt-get upgrade apache2

It should be noted that this can cause some vhost repair to be required, as some Apache directives changed in this version. Once you have done that, you can get the new version of mod_php :

sudo apt-get install libapache2-mod-php5

Answer 3

To check your installed versions type:

cd /etc/php

in your terminal to go to the configuration folder of your PHP installations and then you type:

ls

The output will be the folders that corresponds to the versions installed in your machine. In my case the command outputs:

5.6 7.0 7.1

Answer 4

我总是使用这个命令来查看 PHP 版本列表，以及将一个版本切换到另一个安装 PHP 版本。

sudo update-alternatives --config php

Answer 5

我使用以下命令查看 Ubuntu 中已安装的 php 版本：

sudo dpkg --list | grep ' php[0-9]\\.[0-9] '

Answer 6

您可以在控制台上运行它：

find / -name php | grep bin

Answer 7

Get a list of all installed packages and filter installed PHP versions:

sudo apt list --installed 2>/dev/null | cut -d / -f 1 | grep ^php[0-9].[0-9]$;

or

sudo apt list --installed 2>/dev/null | cut -d / -f 1 | grep ^php[0-9].[0-9]$ | xargs;

if you really need to get only installed PHP versions without unnecessary.

Or

sudo update-alternatives --list php;