PHP怎么传递C指针参数

要调用函数
__int16 __stdcall lib_ver(unsigned char *str_ver);
PHP代码：
$DW=new COM("DynamicWRapper");
$DW->Register("mwrf32.dll","lib_ver","f=s","i=u","r=l");
$buff="assssssssssssaaaaa";
$DW->lib_ver(&$buff);

么传递C指针参数
要调用函数
__int16 __stdcall lib_ver(unsigned char *str_ver);
PHP代码：
$DW=new COM("DynamicWRapper");
$DW->Register("mwrf32.dll","lib_ver","f=s","i=u","r=l");
$buff="assssssssssssaaaaa";