+extern int php_pq_compare_index(const void *lptr, const void *rptr);
+
+/* free zval ptr values (as hash dtor) */
+extern void php_pq_hash_ptr_dtor(zval *p);
+
+#define PHP_PQerrorMessage(c) php_pq_rtrim(PQerrorMessage((c)))
+#define PHP_PQresultErrorMessage(r) php_pq_rtrim(PQresultErrorMessage((r)))
+
+extern zend_class_entry *php_pqdt_class_entry;
+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);
+
+extern zend_class_entry *php_pqconv_class_entry;