On any web site if you are getting error message “Call to undefined function finfo_open” then it is related to php extension fileinfo. If you are on windows and installed wamp then follow these steps. If you are on other platform then you need to edit php.ini file and activate fileinfo extension.
do following changes
A) go to :\wamp\bin\apache\apache{2.2.22}\bin
B) open php.ini file
C)search for ;extension=php_fileinfo.dll.
remove “;” from this line.
save file and restart apache