PHP 7 DOMDocument not found

Question

I tried to run the command app/console cache:clear but it gave an error:

An error occurred when executing the "'cache:clear --no-warmup'" command:
PHP Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowable
Error: Fatal error: Class 'DOMDocument' not found in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Config/Util/XmlUtils.php:52

I use PHP 7 on Ubuntu 14.04 LTS. Installing php5-dom did not resolve my problem:

sudo apt-get install php5-dom

Note that it may be necessary to sudo service apache2 restart after installing the package. — BurninLeo
– BurninLeo, Commented Aug 2, 2016 at 18:14

Barry Last · Accepted Answer · 2016-03-02 10:58:43Z

122

I had the same issue on Ubuntu and fixed it doing the following

apt-get install php-xml

or

sudo apt-get install php-xml

if not as root

answered Mar 2, 2016 at 10:58

Barry Last

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6 Comments

winkbrace Over a year ago

or php7.0-xml

luistamawong Over a year ago

or php5.6-xml

Cyclonecode Over a year ago

Notice that you also need to restart your webserver for this to take effect: sudo service apache2 restart

Hadh Over a year ago

I have a similar issue and I did install php-xml but still same error any idea?

ospider Over a year ago

sudo systemctl restart php7.4-fpm(replace 7.4 with your version)

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Laurel · Accepted Answer · 2023-03-07 16:38:42Z

12

Just a minor addition to the answer. I'm using nginx with PHP 7 and php-fpm. You must restart the php-fpm service in order for the updates to work. Restarting nginx alone won't help.

edited Mar 7, 2023 at 16:38

Laurel

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answered Dec 15, 2016 at 23:26

shuramaan

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