zend_string or not?

Hi all, Is there zend_string usage guideline? I'm wondering if zend_string is used where it is appropriate. Once we release PHP7, adopting zend_string for PHPAPI functions become difficult. (We have to keep legacy API or it will be 3rd party module author's headache if we change this with minor version up.) Evaluation for all PHPAPI functions that have "char *" parameter is finished? If not, we are better to do this now at least for core functions. LXR output seems there are number of core functions that may use zend_string. http://lxr.php.net/search?q=PHPAPI&defs=&refs=&path=&hist=&project=PHP_TRUNK Regards, -- Yasuo Ohgaki yohgaki@ohgaki.net