Facebook needs the CURL PHP extension

How to enable curl in Wamp server

The steps are as follows :

1.     Close WAMP (if running)
2.     Navigate to WAMP\bin\php\(your version of php)\
3.     Edit php.ini
4.     Search for curl, uncomment extension=php_curl.dll
5.     Navigate to WAMP\bin\Apache\(your version of apache)\bin\
6.     Edit php.ini
7.     Search for curl, uncomment extension=php_curl.dll
8.     Save both
9.     Restart WAMP

Solution