Here Is How To Fix "call to undefined function simplexml_load_file()" Error Message on PHP 7
January 28, 2019
I was running a simple XML parsing script which called one of the SimpleXML functions and PHP returned this error:
call to undefined function simplexml_load_file()
The solution I found was to just install the php-xml package like this:
sudo apt install php-xml
I didn't know I'd have to do that. But apparently the xml functions aren't installed on Linux Mint when you install just the PHP cli package.