PHP

php warning: module "curl" is already loaded in unknown on line 0

// 1. check the php.ini, that not have set xdebug
// so for the values extension= and zend_extension=

// 2. check /etc/php5/apache2 and /etc/php5/cli/. 
// You should not load in each php.ini in these directories the extension xdebug.
// so. Only one file, php.ini should load it.

// Note: Inside the path is the string /etc/php5. The 5 is the version of PHP.
// So if you use another version, you always get a different path, like php7.