Not quite. It creates a hash of an object, so two objects with the same data yield the same hashes:
var_dump(spl_object_hash(new stdClass()), spl_object_hash(new stdClass()));
here's the code of spl_object_hash:
len = spprintf(&hash, 0, "%p:%d", Z_OBJ_HT_P(obj), Z_OBJ_HANDLE_P(obj));
md5str[0] = '\0';
PHP_MD5Init(&context);
PHP_MD5Update(&context, (unsigned char*)hash, len);
PHP_MD5Final(digest, &context);
make_digest(md5str, digest);
RETVAL_STRING(md5str, 1);
See any mention of object data? It's not there.
--
Stanislav Malyshev, Zend Software Architect
stas@zend.com http://www.zend.com/
(408)253-8829 MSN: stas@zend.com