extern void php_pqdt_to_string(zval *zdt, const char *format, char **str_buf, size_t *str_len TSRMLS_DC);
extern zend_class_entry *php_pqconv_class_entry;
extern void php_pqdt_to_string(zval *zdt, const char *format, char **str_buf, size_t *str_len TSRMLS_DC);
extern zend_class_entry *php_pqconv_class_entry;