This XML module is not provided on a default php (v7) install on Debian GNU/Linux stretch (9.3)
Add it with: sudo apt-get install php-xml
此扩展默认为启用，编译时可通过下列选项禁用： --disable-simplexml
This XML module is not provided on a default php (v7) install on Debian GNU/Linux stretch (9.3)
Add it with: sudo apt-get install php-xmlFor Linux Ubuntu using PHP 7:
sudo apt-get install php7.0-xmlTo install on CentOS and Redhat, run: sudo yum -y install php-xmlInstalling simpleXml using composer:
"composer require ext-simplexml"
The extension is enabled by default in most distros. You can check the list of php modules using:
"php -m"