Merge branch 'PHP-7.0' into PHP-7.1

diff --cc NEWS
index 5a3a8291d264cf185a17b84da7ca1c5e0743fc21,5e7c69085e9b6d50d648356942751b29e0cb2d88..c18f87f7d708103815cc67f6d01a74ad05916ceb
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -43,17 -62,27 +43,20 @@@ PH
    . Implemented stringify 'uniqueidentifier' fields.
      (Alexander Zhuravlev, Adam Baratz)
  
 -- PDO_pgsql:
 -  . Implemented FR #72633 (Postgres PDO lastInsertId() should work without
 -    specifying a sequence). (Pablo Santiago Sánchez, Matteo)
 -  . Fixed bug #72759 (Regression in pgo_pgsql). (Anatol)
 -
  - Reflection:
 -  . Fixed bug #72846 (getConstant for a array constant with constant values
 -    returns NULL/NFC/UKNOWN). (Laruence)
 +  . Reverted prepending \ for class names. (Trowski)
  
  - Session:
 -  . Fixed bug #72724 (PHP7: session-uploadprogress kills httpd). (Nikita)
    . Fixed bug #72940 (SID always return "name=ID", even if session
      cookie exist). (Yasuo)
 +  . Implemented session_gc() and session_create_id() functions. (Yasuo)
  
+ - SimpleXML:
+   . Fixed bug #72971 (SimpleXML isset/unset do not respect namespace). (Nikita)
+ 
  - Standard:
 -  . Fixed bug #55451 (substr_compare NULL length interpreted as 0). (Lauri
 -    Kenttä)
 -  . Fixed bug #72278 (getimagesize returning FALSE on valid jpg). (cmb)
 +  . Fixed bug #72920 (Accessing a private constant using constant() creates
 +    an exception AND warning). (Laruence)
    . Fixed bug #65550 (get_browser() incorrectly parses entries with "+" sign).
      (cmb)
    . Fixed bug #71882 (Negative ftruncate() on php://memory exhausts memory).

diff --cc ext/simplexml/simplexml.c
Simple merge