blocks|key|4371038|text|我实际上不推荐在php5或php7上使用a2enmod，我会使用update-alternatives。您可以执行sudo+update-alternatives+--config+php来设置您想要使用的系统范围版本。这使得您的命令行和apache版本的工作方式相同。您可以在man+page上阅读有关update-alternatives的更多信息。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4371039|entityMap|0|LINK|mutability|MUTABLE|url|http://manpages.ubuntu.com/manpages/precise/man8/update-alternatives.8.html^0|K|7|W|J|1L|11|48|J|3V|8|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@$9|W|A|X|1|Y]]|E|$]]|$1|F|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

I actually wouldn't recommend using <code>a2enmod</code> for php 5 or 7. I would use <code>update-alternatives</code>. You can do <code>sudo update-alternatives --config php</code> to set which system wide version of PHP you want to use. This makes your command line and apache versions work the same. You can read more about <code>update-alternatives</code> on the <a href="http://manpages.ubuntu.com/manpages/precise/man8/update-alternatives.8.html" rel="noreferrer">man page</a>.

blocks|key|4371075|text|交互式切换模式|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371076|sudo+update-alternatives+--config+php
sudo+update-alternatives+--config+phar
sudo+update-alternatives+--config+phar.phar|code-block|syntax|javascript|4371077|手动切换|4371078|来自PHP5.6+=>+PHP7.1|4371079|您的系统中设置了默认的PHP+5.6，您需要切换到PHP+7.1。|4371080|Apache：|4371081|$+sudo+a2dismod+php5.6
$+sudo+a2enmod+php7.1
$+sudo+service+apache2+restart|4371082|命令行：|4371083|$+sudo+update-alternatives+--set+php+/usr/bin/php7.1
$+sudo+update-alternatives+--set+phar+/usr/bin/phar7.1
$+sudo+update-alternatives+--set+phar.phar+/usr/bin/phar.phar7.1|4371084|来自PHP7.1+=>+PHP5.6|4371085|您的系统中设置了默认的PHP+7.1，您需要切换到PHP+5.6。|4371086|4371087|$+sudo+a2dismod+php7.1
$+sudo+a2enmod+php5.6
$+sudo+service+apache2+restart|4371088|4371089|$+sudo+update-alternatives+--set+php+/usr/bin/php5.6|4371090|Source|offset|length|4371091|entityMap|0|LINK|mutability|MUTABLE|url|https://tecadmin.net/switch-between-multiple-php-version-on-ubuntu/^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|6|0|0^^$0|@$1|2|3|4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1H|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1I|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|1J|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1K|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1L|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1M|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1N|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1O|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|1P|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|Y|3|N|5|6|7|1R|8|@]|9|@]|A|$]]|$1|Z|3|10|5|D|7|1S|8|@]|9|@]|A|$E|F]]|$1|11|3|R|5|6|7|1T|8|@]|9|@]|A|$]]|$1|12|3|13|5|D|7|1U|8|@]|9|@]|A|$E|F]]|$1|14|3|15|5|6|7|1V|8|@]|9|@$16|1W|17|1X|1|1Y]]|A|$]]|$1|18|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]]|19|$1A|$5|1B|1C|1D|A|$1E|1F]]]]

<h3>Interactive switching mode</h3>
<pre><code>sudo update-alternatives --config php
sudo update-alternatives --config phar
sudo update-alternatives --config phar.phar
</code></pre>
<h3>Manual Switching</h3>
<h3>From PHP 5.6 =&gt; PHP 7.1</h3>
Default PHP 5.6 is set on your system and you need to switch to PHP 7.1.
Apache:
<pre><code>$ sudo a2dismod php5.6
$ sudo a2enmod php7.1
$ sudo service apache2 restart
</code></pre>
Command Line:
<pre><code>$ sudo update-alternatives --set php /usr/bin/php7.1
$ sudo update-alternatives --set phar /usr/bin/phar7.1
$ sudo update-alternatives --set phar.phar /usr/bin/phar.phar7.1
</code></pre>
<h3>From PHP 7.1 =&gt; PHP 5.6</h3>
Default PHP 7.1 is set on your system and you need to switch to PHP 5.6.
Apache:
<pre><code>$ sudo a2dismod php7.1
$ sudo a2enmod php5.6
$ sudo service apache2 restart
</code></pre>
Command Line:
<pre><code>$ sudo update-alternatives --set php /usr/bin/php5.6
</code></pre>
<a href="https://tecadmin.net/switch-between-multiple-php-version-on-ubuntu/" rel="noreferrer">Source</a>

blocks|key|4371584|text|您可以创建一个脚本以从versions：sudo+nano+switch_php切换，然后键入以下内容：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4371585|#!/bin/sh
#!/bin/bash
echo+"Switching+to+PHP$1..."
case+$1+in
++++"7")
++++++++sudo+a2dismod+php5.6
++++++++sudo+a2enmod+php7.0
++++++++sudo+service+apache2+restart
++++++++sudo+ln+-sfn+/usr/bin/php7.0+/etc/alternatives/php;;
++++"5.6")
++++++++sudo+a2dismod+php7.0
++++++++sudo+a2enmod+php5.6
++++++++sudo+service+apache2+restart
++++++++sudo+ln+-sfn+/usr/bin/php5.6+/etc/alternatives/php;;
esac
echo+"Current+version:+$(+php+-v+%7C+head+-n+1+%7C+cut+-c-7+)"|code-block|syntax|javascript|4371586|退出并保存使其成为可执行文件：sudo+chmod+%2Bx+switch_php|4371587|要执行该脚本，只需输入./switch_php+[VERSION_NUMBER]，其中参数为7或5.6|4371588|就这样，你现在可以很容易地从PHP7切换到PHP5.6了！|4371589|entityMap^0|K|K|0|0|F|O|0|B|T|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|12|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

You can create a script to switch from versions: <code>sudo nano switch_php</code>
then type this:

<pre><code>#!/bin/sh
#!/bin/bash
echo "Switching to PHP$1..."
case $1 in
 "7")
 sudo a2dismod php5.6
 sudo a2enmod php7.0
 sudo service apache2 restart
 sudo ln -sfn /usr/bin/php7.0 /etc/alternatives/php;;
 "5.6")
 sudo a2dismod php7.0
 sudo a2enmod php5.6
 sudo service apache2 restart
 sudo ln -sfn /usr/bin/php5.6 /etc/alternatives/php;;
esac
echo "Current version: $( php -v | head -n 1 | cut -c-7 )"
</code></pre>

exit and save
make it executable: <code>sudo chmod +x switch_php</code>

To execute the script just type <code>./switch_php [VERSION_NUMBER]</code> where the parameter is 7 or 5.6

That's it you can now easily switch form PHP7 to PHP 5.6!

blocks|key|4371628|text|您可以使用这些开源PHP+Switch+Scripts，它们是专门为在Ubuntu+16.04+LTS中使用而设计的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371629|https://github.com/rapidwebltd/php-switch-scripts|offset|length|4371630|有一个setup.sh脚本可以安装PHP5.6、7.0、7.1和7.2所需的所有依赖项。完成此操作后，只需运行以下切换脚本之一即可更改PHP+CLI和Apache2模块版本。|style|CODE|4371631|./switch-to-php-5.6.sh
./switch-to-php-7.0.sh
./switch-to-php-7.1.sh
./switch-to-php-7.2.sh|code-block|syntax|javascript|4371632|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1D|0|0|3|8|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|F|3|G|5|6|7|10|8|@$D|11|E|12|H|I]]|9|@]|A|$]]|$1|J|3|K|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|C]]]]

You could use these open source PHP Switch Scripts, which were designed specifically for use in Ubuntu 16.04 LTS.

<a href="https://github.com/rapidwebltd/php-switch-scripts" rel="nofollow noreferrer">https://github.com/rapidwebltd/php-switch-scripts</a>

There is a <code>setup.sh</code> script which installs all required dependencies for PHP 5.6, 7.0, 7.1 &amp; 7.2. Once this is complete, you can just run one of the following switch scripts to change the PHP CLI and Apache 2 module version.

<pre><code>./switch-to-php-5.6.sh
./switch-to-php-7.0.sh
./switch-to-php-7.1.sh
./switch-to-php-7.2.sh
</code></pre>

blocks|key|4371205|text|要列出所有可用版本并从中进行选择：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371206|sudo+update-alternatives+--config+php|code-block|syntax|javascript|4371207|或手动执行|4371208|sudo+a2dismod+php7.1+//+disable
sudo+a2enmod+php5.6++//+enable|4371209|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

To list all available versions and choose from them : 

<pre><code>sudo update-alternatives --config php
</code></pre>

Or do manually

<pre><code>sudo a2dismod php7.1 // disable
sudo a2enmod php5.6 // enable
</code></pre>

blocks|key|4371231|text|来自PHP5.6+=>+PHP7.1|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371232|$+sudo+a2dismod+php5.6
$+sudo+a2enmod+php7.1|code-block|syntax|javascript|4371233|对于旧的linux版本|4371234|+$+sudo+service+apache2+restart|4371235|有关更新的版本|4371236|$+systemctl+restart+apache2|4371237|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

From PHP 5.6 => PHP 7.1

<pre><code>$ sudo a2dismod php5.6
$ sudo a2enmod php7.1
</code></pre>

for old linux versions

<pre><code> $ sudo service apache2 restart
</code></pre>

for more recent version

<pre><code>$ systemctl restart apache2
</code></pre>

blocks|key|4371756|text|你可以使用下面的脚本很容易地在PHP版本之间切换，我也包含了phpize配置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371757|https://github.com/anilkumararumulla/switch-php-version|offset|length|4371758|下载脚本文件并运行|4371759|sh+switch.sh|code-block|syntax|javascript|4371760|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1J|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Z|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|C]]]]

You can use the below script to switch between PHP version easily
I have included phpize configuration too.

<a href="https://github.com/anilkumararumulla/switch-php-version" rel="nofollow noreferrer">https://github.com/anilkumararumulla/switch-php-version</a>

Download the script file and run

<pre><code>sh switch.sh
</code></pre>

blocks|key|4371813|text|当在Ubuntu+18.04上安装laravel时，默认选择PHP+7.3.0RC3安装，但laravel和symfony将无法正确安装，并报告缺少php-xml和php-zip，即使它们已经安装。您需要使用上面的说明切换到php+7.1，或者|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371814|+sudo+update-alternatives+--set+php+/usr/bin/php7.1|code-block|syntax|javascript|4371815|现在，运行laravel新博客，将会正常进行|4371816|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

When installing laravel on Ubuntu 18.04, be default PHP 7.3.0RC3 install selected, but laravel and symfony will not install properly complaining about missin php-xml and php-zip, even though they are installed. You need to switch to php 7.1, using the instructions above or,

<pre><code> sudo update-alternatives --set php /usr/bin/php7.1
</code></pre>

now, running laravel new blog, will proceed correctly

blocks|key|4371336|text|也许你的系统中有一个旧的PHP版本，比如PHP5.6，而且你也安装了PHP7.2，所以在你的机器上有多个PHP。有一些应用程序是在旧的PHP5.6是最新版本时开发的，它们仍然存在，你可以在这些应用程序上工作，你可能同时在Laravel上工作，但Laravel需要PHP+7%2B开始。明白了吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371337|在这种情况下，您可以在PHP版本之间进行切换以满足您的需求。|4371338|从PHP5.6+=>+PHP7.2切换|4371339|阿帕奇：-|4371340|sudo+a2dismod+php5.6
sudo+a2enmod+php7.2
sudo+service+apache2+restart|code-block|syntax|javascript|4371341|命令行：-|4371342|sudo+update-alternatives+--set+php+/usr/bin/php7.2
sudo+update-alternatives+--set+phar+/usr/bin/phar7.2
sudo+update-alternatives+--set+phar.phar+/usr/bin/phar.phar7.2
sudo+update-alternatives+--set+phpize+/usr/bin/phpize7.2
sudo+update-alternatives+--set+php-config+/usr/bin/php-config7.2|4371343|反之亦然，从PHP7.2+=>+PHP5.6切换|4371344|4371345|sudo+a2dismod+php7.2
sudo+a2enmod+php5.6
sudo+service+apache2+restart|4371346|4371347|sudo+update-alternatives+--set+php+/usr/bin/php5.6
sudo+update-alternatives+--set+phar+/usr/bin/phar5.6
sudo+update-alternatives+--set+phar.phar+/usr/bin/phar.phar5.6
sudo+update-alternatives+--set+phpize+/usr/bin/phpize5.6
sudo+update-alternatives+--set+php-config+/usr/bin/php-config5.6|4371348|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|16|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|17|8|@]|9|@]|A|$]]|$1|S|3|G|5|6|7|18|8|@]|9|@]|A|$]]|$1|T|3|U|5|J|7|19|8|@]|9|@]|A|$K|L]]|$1|V|3|N|5|6|7|1A|8|@]|9|@]|A|$]]|$1|W|3|X|5|J|7|1B|8|@]|9|@]|A|$K|L]]|$1|Y|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|Z|$]]

May be you might have an old PHP version like PHP 5.6 in your system and you installed PHP 7.2 too so thats multiple PHP in your machine. There are some applications which were developed when older PHP 5.6 was latest version, they are still live and you working on those applications, You might be working on Laravel simultaneously but Laravel requires PHP 7+ to get started. Getting the picture ?

In that case you can switch between the PHP versions to suit your requirements.

Switch From PHP 5.6 => PHP 7.2

Apache:-

<pre><code>sudo a2dismod php5.6
sudo a2enmod php7.2
sudo service apache2 restart
</code></pre>

Command Line:-

<pre><code>sudo update-alternatives --set php /usr/bin/php7.2
sudo update-alternatives --set phar /usr/bin/phar7.2
sudo update-alternatives --set phar.phar /usr/bin/phar.phar7.2
sudo update-alternatives --set phpize /usr/bin/phpize7.2
sudo update-alternatives --set php-config /usr/bin/php-config7.2
</code></pre>

And vice-versa, Switch From PHP 7.2 => PHP 5.6

Apache:-

<pre><code>sudo a2dismod php7.2
sudo a2enmod php5.6
sudo service apache2 restart
</code></pre>

Command Line:-

<pre><code>sudo update-alternatives --set php /usr/bin/php5.6
sudo update-alternatives --set phar /usr/bin/phar5.6
sudo update-alternatives --set phar.phar /usr/bin/phar.phar5.6
sudo update-alternatives --set phpize /usr/bin/phpize5.6
sudo update-alternatives --set php-config /usr/bin/php-config5.6
</code></pre>

blocks|key|4371863|text|请按照以下步骤操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371864|i.e+:+your+current+version+is+:+current_version+=+7.3+,+and+you+want+to+change+it+to+:+new_version+=+7.2

1)+sudo+a2dismod+php(current_version)+
2)+sudo+a2enmod+php(new_version)
3)+sudo+update-alternatives+--config+php+(here+you+need+to+select+php+version+number)+
4)+restart+apache+through+:+
++sudo+/etc/init.d/apache2+restart+OR
++sudo+service+apache2+restart|code-block|syntax|javascript|4371865|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

please follow the steps : 

<pre><code>i.e : your current version is : current_version = 7.3 , and you want to change it to : new_version = 7.2

1) sudo a2dismod php(current_version) 
2) sudo a2enmod php(new_version)
3) sudo update-alternatives --config php (here you need to select php version number) 
4) restart apache through : 
 sudo /etc/init.d/apache2 restart OR
 sudo service apache2 restart
</code></pre>

blocks|key|4371880|text|我做了一个bash脚本来在Ubuntu上的不同PHP版本之间切换。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371881|希望这能帮助到别人。|4371882|下面是脚本：(将其保存在/usr/local/bin/sphp.sh中，不要忘记使用以下命令添加%2Bx标志:+sudo+chmod+%2Bx+/usr/local/bin/sphp.sh)|4371883|​|4371884|#!/bin/bash

#+Usage
if+[+$#+-ne+1+];+then
++echo+"Usage:+sphp+[phpversion]"
++echo+"Example:+sphp+7.2"
++exit+1
fi

currentversion="`php+-r+\"error_reporting(0);+echo+str_replace('.',+'',+substr(phpversion(),+0,+3));\"`"
newversion="$1"

majorOld=${currentversion:0:1}
minorOld=${currentversion:1:1}
majorNew=${newversion:0:1}
minorNew=${newversion:2:1}

if+[+$?+-eq+0+];+then
++if+[+"${newversion}"+==+"${currentversion}"+];+then
++++echo+"PHP+version+[${newversion}]+is+already+being+used"
++++exit+1
++fi

++echo+"PHP+version+[$newversion]+found"
++echo+"Switching+from+[php${currentversion}]+to+[php${newversion}]+...+"

++printf+"a2dismod+php$majorOld.$minorOld+...+"
++sudo+a2dismod+"php${majorOld}.${minorOld}"
++printf+"[OK]+and+"

++printf+"a2enmod+php${newversion}+...+"
++sudo+a2enmod+"php${majorNew}.${minorNew}"
++printf+"[OK]\n"

++printf+"update-alternatives+...+"
++sudo+update-alternatives+--set+php+"/usr/bin/php${majorNew}.${minorNew}"
++printf+"[OK]\n"

++sudo+service+apache2+restart
++printf+"[OK]+apache2+restarted\n"
else
++echo+"PHP+version+$majorNew.$minorNew+was+not+found."
++echo+"Try+\`sudo+apt+install+php@${newversion}\`+first."
++exit+1
fi

echo+"DONE!"|code-block|syntax|javascript|4371885|4371886|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|S|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|T|8|@]|9|@]|A|$K|L]]|$1|M|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|O|$]]

I made a bash script to switch between different PHP versions on Ubuntu.

Hope it helps someone.

Here's the script:
(save it in /usr/local/bin/sphp.sh, don't forget to add +x flag with command: sudo chmod +x /usr/local/bin/sphp.sh)

<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>#!/bin/bash

# Usage
if [ $# -ne 1 ]; then
 echo "Usage: sphp [phpversion]"
 echo "Example: sphp 7.2"
 exit 1
fi

currentversion="`php -r \"error_reporting(0); echo str_replace('.', '', substr(phpversion(), 0, 3));\"`"
newversion="$1"

majorOld=${currentversion:0:1}
minorOld=${currentversion:1:1}
majorNew=${newversion:0:1}
minorNew=${newversion:2:1}

if [ $? -eq 0 ]; then
 if [ "${newversion}" == "${currentversion}" ]; then
 echo "PHP version [${newversion}] is already being used"
 exit 1
 fi

 echo "PHP version [$newversion] found"
 echo "Switching from [php${currentversion}] to [php${newversion}] ... "

 printf "a2dismod php$majorOld.$minorOld ... "
 sudo a2dismod "php${majorOld}.${minorOld}"
 printf "[OK] and "

 printf "a2enmod php${newversion} ... "
 sudo a2enmod "php${majorNew}.${minorNew}"
 printf "[OK]\n"

 printf "update-alternatives ... "
 sudo update-alternatives --set php "/usr/bin/php${majorNew}.${minorNew}"
 printf "[OK]\n"

 sudo service apache2 restart
 printf "[OK] apache2 restarted\n"
else
 echo "PHP version $majorNew.$minorNew was not found."
 echo "Try \`sudo apt install php@${newversion}\` first."
 exit 1
fi

echo "DONE!"</code></pre>
</div>
</div>

blocks|key|4371909|text|这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4371910|sudo+update-alternatives+--set+php+/usr/bin/php7.4|code-block|syntax|javascript|4371911|只需将PHP版本更改为您需要的版本，我已将其更改为php7.4|4371912|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

this worked for me:-
<pre><code>sudo update-alternatives --set php /usr/bin/php7.4
</code></pre>
just change the PHP version to whichever version you need I have changed it to php7.4

I have installed php 5.6 and and php 7.1 on my Ubuntu 16.04
I know with Apache as my web server, I can do
<pre><code>a2enmod php5.6 #to enable php5
a2enmod php7.1 #to enable php7
</code></pre>
When I disable php7.1 in Apache modules and enable php 5.6, Apache recognizes the change and uses php 5.6 interpreter as expected.
But when I run internal php web server from the commandline:
<pre><code>php -S localhost:8888
</code></pre>
php handles requests using php 7. So how do I switch between php 5.6 and php 7.1 in the command line ?

Switch php versions on commandline ubuntu 16.04

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我在我的Ubuntu 16.04上安装了php 5.6和php 7.1我知道使用Apache作为我的web服务器，我可以做到a2enmod php5.6 #to enable php5a2enmod php7.1 #to enable php7当我在Apache模块中禁用php7.1并启用php5.6时，Apache识...

问在命令行ubuntu 16.04上切换php版本
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