Remove assignment of new by reference
Remove # comments in ini files
Remove static calls from incompatible $this context
Remove deprecated mcrypt functions

Removes the following functions:

mcrypt_ecb
mcrypt_cbc
mcrypt_cfb
mcrypt_ofb
mcrypt_generic_end
Remove unsafe curl file uploads
Remove preg_replace /e modifier
Remove set_magic_quotes_runtime

And the alias magic_quotes_runtime
Remove set_socket_blocking
Remove string category support in setlocale()
Remove xsl.security_prefs ini option
Remove mktime() and gmmktime() $is_dst parameter
Remove dl() on fpm-fcgi