5.2.x
Other Enhancements
Other Enhancements
Other Enhancements
-
Improved memory manager
and increased default memory limit. The new memory manager allocates less memory and works
faster than the previous incarnation. It allocates memory from the
system in large blocks, and then manages the heap by itself. The
memory_limit value in php.ini
is checked, not for each emalloc() call (as before), but
for actual blocks requested from the system. This means that
memory_limit is far more accurate than it used to be,
since the old memory manager didn’t calculate all the memory
overhead used by the malloc library. Thanks to this new-found accuracy memory usage may appear
to have increased, although actually it has not. To accommodate
this apparent increase, the default memory_limit setting
was also increased – from 8 to 16 megabytes. -
Added support for
constructors in interfaces to force constructor signature checks in
implementations. Starting with PHP
5.2.0, interfaces can have constructors. However, if you choose to
declare a constructor in an interface, each class implementing that
interface MUST include a constructor with a signature matching that
of the base interface constructor. By ‘signature’ we mean the
parameter and return type definitions, including any type hints and
including whether the data is passed by reference or by
value.