Changed functions

PHP Core
crypt will now raise an 
E_NOTICE error if the 
salt parameter is omitted.
substr_compare will now accept 
0 for its 
length parameter.
unserialize will now fail if passed serialised data that has been manipulated to attempt to instantiate an object without calling its constructor.
cURL
Uploads using the 
@file syntax are now only supported if the 
CURLOPT_SAFE_UPLOAD option is set to ENTITY. 
CURLFile should be used instead.
Mcrypt
The 
source parameter of 
mcrypt_create_iv now defaults to 
MCRYPT_DEV_URANDOM instead of 
MCRYPT_DEV_RANDOM.
OpenSSL
stream_socket_enable_crypto now allows the 
crypto_type parameter to be optional if the stream's SSL context includes the new 
crypto_type option.
PostgreSQL
pg_insert, 
pg_select, 
pg_update and 
pg_delete are no longer experimental.
pg_send_execute, 
pg_send_prepare, 
pg_send_query and 
pg_send_query_params will no longer block until query write completion if the underlying socket stream for the database connection is set to non-blocking mode.
Reflection
ReflectionClass::newInstanceWithoutConstructor now allows non-final internal classes to be instantiated.
XMLReader
XMLReader::getAttributeNs and XMLReader::getAttributeNo now return ENTITY if the attribute could not be found, like XMLReader::getAttribute.