- Fix bug #37510 session_regenerate_id changes session_id() even on failure

ext/session/session.c

@@ -1364,6 +1364,11 @@ PHP_FUNCTION(session_regenerate_id)
 		WRONG_PARAM_COUNT;
 	}
 
+	if (SG(headers_sent)) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot regenerate session id - headers already sent");
+		RETURN_FALSE;
+	}
+
 	if (PS(session_status) == php_session_active) {
 		if (PS(id)) {
 			if (del_ses && PS(mod)->s_destroy(&PS(mod_data), PS(id) TSRMLS_CC) == FAILURE) {
@@ -1720,6 +1725,6 @@ PHP_MINFO_FUNCTION(session)
  * tab-width: 4
  * c-basic-offset: 4
  * End:
- * vim600: sw=4 ts=4 fdm=marker
+ * vim600: noet sw=4 ts=4 fdm=marker
  * vim<600: sw=4 ts=4
  */