-extern zval *php_pqdt_from_string(zval *zv, char *input_fmt, char *dt_str, size_t dt_len, char *output_fmt, zval *ztimezone TSRMLS_DC);
-extern void php_pqdt_to_string(zval *zdt, const char *format, char **str_buf, size_t *str_len TSRMLS_DC);
+extern zval *php_pqdt_from_string(zval *zv, char *input_fmt, char *dt_str, size_t dt_len, char *output_fmt, zval *ztimezone);
+extern zend_string *php_pqdt_to_string(zval *zdt, const char *format);