PHP Manual
Appendices
Migrating from PHP 7.0.x to PHP 7.1.x
New features
New functions
New global constants
Backward incompatible changes
Deprecated features in PHP 7.1.x
Changed functions
Other changes
Windows Support
New features
New global constants
Migrating from PHP 7.0.x to PHP 7.1.x
PHP Manual
New functions
PHP Core
sapi_windows_cp_get
sapi_windows_cp_set
sapi_windows_cp_conv
sapi_windows_cp_is_utf8
Closure
Closure::fromCallable
CURL
curl_multi_errno
curl_share_errno
curl_share_strerror
OpenSSL
openssl_get_curve_names
Session
session_create_id
session_gc
SPL
is_iterable
PCNTL
pcntl_async_signals
pcntl_signal_get_handler