blocks|key|3044870|text|创建一个空的PHP文件，只放入<?php+phpinfo();，在浏览器中查看它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3044871|检查您是否可以在配置选项中发现--disable-dom和/或是否可以在下面的列表中查看有关DOM扩展的详细信息。|3044872|如果您在列表中看不到DOM，或者您看到它被禁用，则说明您的PHP安装没有包含DOM扩展。你需要从源代码重新编译你的PHP安装来解决这个问题。|3044873|entityMap^0|F|G|0|F|D|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

Create an empty PHP file and put only <code>&lt;?php phpinfo();</code> in it, look at it in a browser. 
Check if you can spot <code>--disable-dom</code> in the configuration options and/or if you can see details about the DOM extension in the list below.

If you cannot see DOM in the list or you see it is disabled, your PHP installation does not include the DOM extension. You'll need to recompile your PHP installation from source to remedy that.

blocks|key|200951|text|您需要安装DOM扩展。您可以在Debian+/+Ubuntu上使用以下命令执行此操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|200952|sudo+apt-get+install+php-dom|code-block|syntax|javascript|200953|在Centos+/+Fedora+/+Red+Hat上：|200954|yum+install+php-xml|200955|如果你遇到PHP包之间的冲突，你可以尝试查看特定的PHP版本包是否存在:例如，如果你的系统运行PHP5.3，就使用php53-xml。|style|CODE|200956|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/en/dom^0|5|3|0|0|0|0|0|1L|9|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|15|8|@$A|16|B|17|O|P]]|9|@]|C|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

You need to install the <a href="http://www.php.net/en/dom" rel="noreferrer">DOM</a> extension. You can do so on Debian / Ubuntu using:
<pre><code>sudo apt-get install php-dom
</code></pre>
And on Centos / Fedora / Red Hat:
<pre><code>yum install php-xml
</code></pre>
If you get conflicts between PHP packages, you could try to see if the specific PHP version package exists instead: e.g. <code>php53-xml</code> if your system runs PHP5.3.

blocks|key|2832339|text|我使用的是Centos，下面的命令对我有效，我运行以下命令|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2832340|yum+--enablerepo+remi+install+php-xml|code-block|syntax|javascript|2832341|并使用以下命令重新启动Apache|2832342|sudo+service+httpd+restart|2832343|entityMap^0|5|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

I'm using Centos and the followings worked for me , I run this command

<pre><code>yum --enablerepo remi install php-xml
</code></pre>

And restarted the Apache with this command

<pre><code>sudo service httpd restart
</code></pre>

blocks|key|2832360|text|PHP7.0|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2832361|红帽Ubuntu：apt-get+install+php7.0-xml|CODE|2832362|CentOS+/+Fedora+/|unordered-list-item|2832363|：yum+install+php70w-xml|2832364|2832365|2832366|PHP7.1|2832367|红帽Ubuntu：apt-get+install+php7.1-xml|2832368|CentOS+/+Fedora+/|2832369|：yum+install+php71w-xml|2832370|2832371|2832372|PHP7.2|2832373|红帽Ubuntu：apt-get+install+php7.2-xml|2832374|CentOS+/+Fedora+/|2832375|：yum+install+php72w-xml|2832376|2832377|2832378|PHP7.3|2832379|红帽Ubuntu：apt-get+install+php7.3-xml|2832380|CentOS+/+Fedora+/|2832381|：yum+install+php73w-xml|2832382|2832383|2832384|PHP7.4|2832385|红帽Ubuntu：apt-get+install+php7.4-xml|2832386|CentOS+/+Fedora+/|2832387|：yum+install+php74w-xml|2832388|2832389|2832390|PHP8.0|2832391|2832392|Ubuntu:支持php:remi-8.0的apt-get+install+php8.0-xml|2832393|CentOS+8：dnf+install+php-xml|2832394|2832395|entityMap^0|0|6|0|9|Q|0|0|1|M|0|0|0|0|6|0|9|Q|0|0|1|M|0|0|0|0|6|0|9|Q|0|0|1|M|0|0|0|0|6|0|9|Q|0|0|1|M|0|0|0|0|6|0|9|Q|0|0|1|M|0|0|0|0|6|0|0|9|C|M|Q|0|9|J|0|0^^$0|@$1|2|3|4|5|6|7|23|8|@$9|24|A|25|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|26|8|@$9|27|A|28|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|29|8|@]|D|@]|E|$]]|$1|L|3|M|5|K|7|2A|8|@$9|2B|A|2C|B|H]]|D|@]|E|$]]|$1|N|3|-4|5|6|7|2D|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|2E|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|2F|8|@$9|2G|A|2H|B|C]]|D|@]|E|$]]|$1|R|3|S|5|6|7|2I|8|@$9|2J|A|2K|B|H]]|D|@]|E|$]]|$1|T|3|U|5|K|7|2L|8|@]|D|@]|E|$]]|$1|V|3|W|5|K|7|2M|8|@$9|2N|A|2O|B|H]]|D|@]|E|$]]|$1|X|3|-4|5|6|7|2P|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|2Q|8|@]|D|@]|E|$]]|$1|Z|3|10|5|6|7|2R|8|@$9|2S|A|2T|B|C]]|D|@]|E|$]]|$1|11|3|12|5|6|7|2U|8|@$9|2V|A|2W|B|H]]|D|@]|E|$]]|$1|13|3|14|5|K|7|2X|8|@]|D|@]|E|$]]|$1|15|3|16|5|K|7|2Y|8|@$9|2Z|A|30|B|H]]|D|@]|E|$]]|$1|17|3|-4|5|6|7|31|8|@]|D|@]|E|$]]|$1|18|3|-4|5|6|7|32|8|@]|D|@]|E|$]]|$1|19|3|1A|5|6|7|33|8|@$9|34|A|35|B|C]]|D|@]|E|$]]|$1|1B|3|1C|5|6|7|36|8|@$9|37|A|38|B|H]]|D|@]|E|$]]|$1|1D|3|1E|5|K|7|39|8|@]|D|@]|E|$]]|$1|1F|3|1G|5|K|7|3A|8|@$9|3B|A|3C|B|H]]|D|@]|E|$]]|$1|1H|3|-4|5|6|7|3D|8|@]|D|@]|E|$]]|$1|1I|3|-4|5|6|7|3E|8|@]|D|@]|E|$]]|$1|1J|3|1K|5|6|7|3F|8|@$9|3G|A|3H|B|C]]|D|@]|E|$]]|$1|1L|3|1M|5|6|7|3I|8|@$9|3J|A|3K|B|H]]|D|@]|E|$]]|$1|1N|3|1O|5|K|7|3L|8|@]|D|@]|E|$]]|$1|1P|3|1Q|5|K|7|3M|8|@$9|3N|A|3O|B|H]]|D|@]|E|$]]|$1|1R|3|-4|5|6|7|3P|8|@]|D|@]|E|$]]|$1|1S|3|-4|5|6|7|3Q|8|@]|D|@]|E|$]]|$1|1T|3|1U|5|6|7|3R|8|@$9|3S|A|3T|B|C]]|D|@]|E|$]]|$1|1V|3|-4|5|6|7|3U|8|@]|D|@]|E|$]]|$1|1W|3|1X|5|K|7|3V|8|@$9|3W|A|3X|B|H]|$9|3Y|A|3Z|B|H]]|D|@]|E|$]]|$1|1Y|3|1Z|5|K|7|40|8|@$9|41|A|42|B|H]]|D|@]|E|$]]|$1|20|3|-4|5|6|7|43|8|@]|D|@]|E|$]]|$1|21|3|-4|5|6|7|44|8|@]|D|@]|E|$]]]|22|$]]

PHP 7.0:
<ul>
<li>Ubuntu: <code>apt-get install php7.0-xml</code></li>
<li>CentOS / Fedora / Red Hat: <code>yum install php70w-xml</code></li>
</ul>
PHP 7.1:
<ul>
<li>Ubuntu: <code>apt-get install php7.1-xml</code></li>
<li>CentOS / Fedora / Red Hat: <code>yum install php71w-xml</code></li>
</ul>
PHP 7.2:
<ul>
<li>Ubuntu: <code>apt-get install php7.2-xml</code></li>
<li>CentOS / Fedora / Red Hat: <code>yum install php72w-xml</code></li>
</ul>
PHP 7.3:
<ul>
<li>Ubuntu: <code>apt-get install php7.3-xml</code></li>
<li>CentOS / Fedora / Red Hat: <code>yum install php73w-xml</code></li>
</ul>
PHP 7.4:
<ul>
<li>Ubuntu: <code>apt-get install php7.4-xml</code></li>
<li>CentOS / Fedora / Red Hat: <code>yum install php74w-xml</code></li>
</ul>
PHP 8.0
<ul>
<li>Ubuntu: <code>apt-get install php8.0-xml</code></li>
<li>CentOS 8 [with <code>php:remi-8.0</code> enabled]: <code>dnf install php-xml</code></li>
</ul>

blocks|key|198633|text|PHP8：(最新版本)|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|198634|sudo+apt-get+install+php8.0-xml|code-block|syntax|javascript|198635|PHP7|198636|sudo+apt-get+install+php7.1-xml|198637|您还可以执行以下操作：|198638|sudo+apt-get+install+php-dom|198639|apt-get会告诉你它在哪里。|CODE|198640|entityMap^0|0|4|0|0|0|4|0|0|0|0|0|7|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|15|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|17|8|@$9|18|A|19|B|U]]|D|@]|E|$]]|$1|V|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|W|$]]

PHP8: (latest version)
<pre><code>sudo apt-get install php8.0-xml
</code></pre>
PHP7:
<pre><code>sudo apt-get install php7.1-xml
</code></pre>
You can also do:
<pre><code>sudo apt-get install php-dom
</code></pre>
and <code>apt-get</code> will show you where it is.

blocks|key|3045014|text|使用Suse+Linux+(Linux+3.16.7-48-default)和PHP+5.6.1作为root，这有助于：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3045015|zypper+in+php5-dom|code-block|syntax|javascript|3045016|加上重启|3045017|systemctl+restart+apache2|3045018|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|$]]

Using Suse Linux (Linux linux 3.16.7-48-default) and PHP 5.6.1 as root, this helped:

<pre><code>zypper in php5-dom
</code></pre>

plus restart

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

blocks|key|198656|text|Package+php-dom+is+a+virtual+package+provided+by:
++php7.1-xml+7.1.3%2B-3%2Bdeb.sury.org~xenial%2B1
++php7.0-xml+7.0.17-3%2Bdeb.sury.org~xenial%2B1
++php5.6-xml+5.6.30-9%2Bdeb.sury.org~xenial%2B1
You+should+explicitly+select+one+to+install.|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|198657|如果任何人使用5.6版本，那么就使用这种方式|unstyled|198658|sudo+apt-get+install+php5.6-xml|198659|对于Php+Ver+PHP7，Ubuntu：|198660|sudo+apt-get+install+php7.1-xml|198661|或通过|198662|yum+install+php-xml|198663|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|M|3|N|5|F|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|Q|3|-4|5|F|7|Z|8|@]|9|@]|A|$]]]|R|$]]

<pre><code>Package php-dom is a virtual package provided by:
 php7.1-xml 7.1.3+-3+deb.sury.org~xenial+1
 php7.0-xml 7.0.17-3+deb.sury.org~xenial+1
 php5.6-xml 5.6.30-9+deb.sury.org~xenial+1
You should explicitly select one to install.
</code></pre>

In case anyone using 5.6 versions then go with this way 

<pre><code>sudo apt-get install php5.6-xml
</code></pre>

For Php Ver PHP7, Ubuntu:

<pre><code>sudo apt-get install php7.1-xml
</code></pre>

or by 

<pre><code>yum install php-xml
</code></pre>

blocks|key|198665|text|此帮助(Ubuntu+Linux)+PHP+5.6.3|type|unstyled|depth|inlineStyleRanges|entityRanges|data|198666|198667|+sudo+apt-get+install+php5.6-dom|blockquote|198668|198669|198670|这对我来说很有效。|198671|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|M|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|N|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|P|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Q|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|K|$]]

This help for me (Ubuntu Linux) PHP 5.6.3

<blockquote>
 sudo apt-get install php5.6-dom
</blockquote>

Thats work for me.

blocks|key|203392|text|在fedora+26上：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|203393|dnf+install+php-dom|code-block|syntax|javascript|203394|把它修好！|203395|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|$]]

On fedora 26:

<pre><code>dnf install php-dom
</code></pre>

Fixes it !

blocks|key|3045092|text|对于Centos+7和php+7.1：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3045093|yum安装php71w-xml|3045094|apachectl重启|3045095|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

For Centos 7 and php 7.1: 
yum install php71w-xml 
apachectl restart

blocks|key|201054|text|如果使用--disable-all从源代码编译，则可以使用以下命令启用DOMDocument支持|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|201055|--enable-dom|201056|示例：|201057|./configure+--disable-all+--enable-dom|code-block|syntax|javascript|201058|针对Centos7和PHP7进行了测试和工作|201059|entityMap^0|4|D|0|0|C|0|0|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|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|Z|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|10|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

If compiling from source with <code>--disable-all</code> then DOMDocument support can be enabled with 
<code>--enable-dom</code>

Example:

<pre><code>./configure --disable-all --enable-dom
</code></pre>

Tested and working for Centos7 and PHP7

blocks|key|2832644|text|我使用的是带有virtualmin和三个CentOS版本的PHP7。我还启用了REMI+repo。这对我来说很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2832645|步骤1：|2832646|只需附加PHP主版本号，就像这样的php{version+number}-xml。并运行yum+install|offset|length|style|CODE|2832647|yum+install+php70-php-xml
yum+install+php71-php-xml
yum+install+php72-php-xml|code-block|syntax|javascript|2832648|第2步：|2832649|别忘了重启Apache：|2832650|service+httpd+restart|2832651|entityMap^0|0|0|H|N|18|B|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@$F|Z|G|10|H|I]|$F|11|G|12|H|I]]|9|@]|A|$]]|$1|J|3|K|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|L|7|16|8|@]|9|@]|A|$M|N]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

I'm using CentOS 7 with virtualmin and three PHP versions. I also have REMI repo enabled. it worked for me:

<h1>Step 1:</h1>

Just append PHP major version number like this <code>php{version number}-xml</code>. And run <code>yum install</code>

<pre><code>yum install php70-php-xml
yum install php71-php-xml
yum install php72-php-xml
</code></pre>

<h2>Step 2:</h2>

Don't forget to restart Apache:

<pre><code>service httpd restart
</code></pre>

blocks|key|201811|text|如果您正在使用PHP7.0安装Magento，我建议您通过以下命令安装所有扩展|type|unstyled|depth|inlineStyleRanges|entityRanges|data|201812|sudo+apt-get+install+php7.0+php7.0-xml+php7.0-mcrypt+php7.0-curl+php7.0-cli+php7.0-mysql+php7.0-gd+libapache2-mod-php7.0+php7.0-intl+php7.0-soap+php7.0-zip+php7.0-bcmath|offset|length|style|CODE|201813|我需要谷歌一些时间，以满足Magento的要求。|201814|我认为如果您使用另一个PHP版本，可以将PHP版本替换为7.x|201815|需要重新启动Apache才能加载新的扩展|201816|sudo+service+apache2+restart|201817|entityMap^0|0|0|4P|0|0|0|0|0|S|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|Q|$]]

If you are using PHP7.0 to install Magento, I suggest to install all extensions by this command

<code>
sudo apt-get install php7.0 php7.0-xml php7.0-mcrypt php7.0-curl php7.0-cli php7.0-mysql php7.0-gd libapache2-mod-php7.0 php7.0-intl php7.0-soap php7.0-zip php7.0-bcmath
</code>

I need to Google some times to meet Magento requirement.

I think you can replace the PHP version to 7.x if you use another PHP version

And restart Apache is needed to load new extensions

<code>
sudo service apache2 restart
</code>

blocks|key|203456|text|PHP+7.X+Centos+7|type|unstyled|depth|inlineStyleRanges|entityRanges|data|203457|当我尝试使用上面的建议安装模块时，我遇到了依赖问题，添加了这个标志：|203458|--enablerepo=remi-php7X|offset|length|style|CODE|203459|已解析的依赖项。|203460|所以|203461|sudo+yum+--enablerepo=remi-php7X+install+php-xml|203462|然后|203463|service+httpd+restart|203464|参考：Install+PHP+Modules|203465|entityMap|0|LINK|mutability|MUTABLE|url|https://tecadmin.net/install-php7-on-centos7/#post-9400^0|0|0|0|N|0|0|0|0|1C|0|0|0|L|0|3|J|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|15|8|@$F|16|G|17|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|18|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1A|8|@$F|1B|G|1C|H|I]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1D|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1E|8|@$F|1F|G|1G|H|I]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1H|8|@]|9|@$F|1I|G|1J|1|1K]]|A|$]]|$1|V|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12]]]]

PHP 7.X Centos 7
I got dependency issues when trying to install module with above suggestions, adding this flag:
<code>--enablerepo=remi-php7X</code>
Resolved dependencies.
So
<code>sudo yum --enablerepo=remi-php7X install php-xml</code>
Then
<code>service httpd restart</code>
Ref:
<a href="https://tecadmin.net/install-php7-on-centos7/#post-9400" rel="nofollow noreferrer">Install PHP Modules</a>

blocks|key|3045262|text|在PHPunit遭受了很长一段时间的痛苦之后...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3045263|对于那些使用命名空间的人来说，这在框架或内容管理系统中非常常见，除了查看php-xml是否已安装并处于活动状态之外，还有一个很好的检查，那就是记住在命名空间后面声明DOMDocument：|3045264|namespace+YourNameSpace\YourNameSpace;

use+DOMDocument;+//<---+here,+check+this!|code-block|syntax|javascript|3045265|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

After a long time suffering from it in PHPunit...
For those using namespace, which is very common with Frameworks or CMS, a good check in addition to seeing if php-xml is installed and active, is to remember to declare the DOMDocument after the namespace:
<pre><code>namespace YourNameSpace\YourNameSpace;

use DOMDocument; //&lt;--- here, check this!
</code></pre>

blocks|key|2832747|text|对于PHP+7.4，请安装DOM扩展。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2832748|Debian+/+Ubuntu:|offset|length|style|BOLD|2832749|sudo+apt-get+update
sudo+apt-get+install+php7.4-xml
sudo+service+apache2+restart|code-block|syntax|javascript|2832750|Centos+/+Fedora+/红帽：|2832751|yum+update
yum+install+php74w-xml
systemctl+restart+httpd|2832752|对于以前的PHP版本，请替换为您的版本。|2832753|entityMap^0|0|0|G|0|0|0|K|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@$D|W|E|X|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|Y|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|Z|8|@$D|10|E|11|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|T|$]]

For PHP 7.4 Install the DOM extension.
Debian / Ubuntu:
<pre><code>sudo apt-get update
sudo apt-get install php7.4-xml
sudo service apache2 restart
</code></pre>
Centos / Fedora / Red Hat:
<pre><code>yum update
yum install php74w-xml
systemctl restart httpd
</code></pre>
For previous PHP releases, replace with your version.

blocks|key|3045325|text|这是php+v8.0的最新版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3045326|sudo+apt-get+install+php8.0-xml|code-block|syntax|javascript|3045327|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|$]]

this is the lastest for php v 8.0
<pre><code>sudo apt-get install php8.0-xml
</code></pre>

blocks|key|2832778|text|在安装了PHP+8.0的Amazon+Linux+2上，我不得不|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2832779|yum-config-manager+--enable+remi-php80
yum+install+php-xml|code-block|syntax|javascript|2832780|别忘了重启PHP|2832781|systemctl+restart+php-fpm|2832782|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|$]]

On a Amazon Linux 2 with PHP 8.0, I had to
<pre><code>yum-config-manager --enable remi-php80
yum install php-xml
</code></pre>
Do not forget to restart PHP
<pre><code>systemctl restart php-fpm
</code></pre>

I've found an error on a page in my Magento application; it always show this message error when I visit it:

<blockquote>
 Fatal error: Class 'DOMDocument' not found in /home/.../lib/Zend/Feed/Abstract.php on line 95
</blockquote>

Can you give me a solution? I'm using magento 1.4.1.1.

Class 'DOMDocument' not found

CentOS

Ubuntu

Fedora

Debian

Linux

我在Magento应用程序的页面上发现了一个错误；当我访问它时，它总是显示以下错误消息：致命错误:在第95行的/home/.../lib/Zend/Feed/Abstract.php中找不到类'DOMDocument‘你能给我一个解决方案吗？我使用的是magento 1.4.1.1。

问找不到类“DOMDocument”
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