PHP 7 simpleXML

Question

I\'m testing PHP7, and have a weird issue after a recent update. SimpleXML should be enabled by default, and my phpinfo page shows that it is available:

Answer 1

------------------in centos-------------------------

find out which package provides php-xml:

 yum provides php-xml

then from the output list,select the appropriate one, install

yum install php70u-xml-7.0.14-2.ius.centos7.x86_64