Merge branch 'PHP-7.4'

diff --cc tests/classes/constants_basic_001.phpt
index c901ebacecb2743430597cce506c56b2e9c1a673,6a281e7d329eabc4c52e5104c9e02240f17b219a..38da2dfde009c4d8cb3378d5784c108a6fb3b536
--- 1/tests/classes/constants_basic_001.phpt
--- 2/tests/classes/constants_basic_001.phpt
+++ b/tests/classes/constants_basic_001.phpt
@@@ -64,10 -70,10 +64,10 @@@ int(1
  float(1.5)
  int(-1)
  float(-1.5)
 -int(15)
 +int(13)
  string(%d) "%s"
  string(1) "C"
- string(1) "C"
+ string(0) ""
  string(0) ""
  int(1234)
  int(456)