In PHP-5.6 and below each argument passed to user function was copies on VM stack twice.
Now we always have ZEND_INIT_FCALL (or simular) opcode that pushes "call frame" on top of VM stack.
"Call frame" is actually the same zend_execute_data structure.
All the following ZEND_SEND instructions push arguments on top of the stack in a way that they directly comes into corresponding CV variables of the called frame. Extra arguments are copied at the end of stack frame (after all CV and TMP variables) on function enterance.
There are two minor incompatibilities:
1) It's not allowed to decalre functions redefining arguments e.g. "function foo($a,$a) {}".
2) func_get_arg() and func_get args() return the current value of argument and not the original value that was sent.
I totally hate this approach. It's ugly and I don't think I can
share code with the static scalar evaluation. Maybe I should use
the approach that static scalars use instead?
* master: (41 commits)
Update copyright year to 2014
Update copyright year to 2014
Update copyright year to 2014
Update copyright year to 2014
Update copyright year to 2014
Update copyright year to 2014
Update copyright year to 2014
NEWS
Fix Request #67453 Allow to unserialize empty data.
Update copyright year to 2014
Update copyright year for re2c generated files
Update copyright year to 2014
Update copyright year for re2c files as well
Fix patch for bug #67436
fix failed test
Fix test on modern distro where old unsecure algo are disabled in openssl config. Testing recent algo should be enough to check this function.
Added tests for bug 67436
Fixed wrong XFAIL test - already fixed
Fix typo in Bug #67406 NEWS entry
Fix typo in Bug #67406 NEWS entry
...
Conflicts:
Zend/zend_compile.c
ext/session/session.c
ext/standard/array.c
ext/standard/http_fopen_wrapper.c
tests/classes/bug63462.phpt
