PHP Core

• debug_zval_dump now prints "int" instead of "long", and "float" instead of "double"
• dirname now optionally takes a second parameter, depth, to get the name of the directory depth levels up from the current directory.
• getrusage is now supported on Windows.
• mktime and gmmktime functions no longer accept is_dst parameter.
• preg_replace function no longer supports "\e" (PREG_REPLACE_EVAL). preg_replace_callback should be used instead.
• setlocale function no longer accepts category passed as string. LC_* constants must be used instead.
• exec, system and passthru functions have NULL byte protection now.
• shmop_open now returns a resource instead of an int, which has to be passed to shmop_size, shmop_write, shmop_read, shmop_close and shmop_delete.
• substr and iconv_substr now return an empty string, if string is equal to start characters long.
• xml_parser_free is no longer sufficient to free the parser resource, if it references an object and this object references that parser resource. In this case it is necessary to additionally unset the $parser.