预定义常量

下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

CAL_GREGORIAN (integer) CAL_JULIAN (integer) CAL_JEWISH (integer) CAL_FRENCH (integer) CAL_NUM_CALS (integer) CAL_DOW_DAYNO (integer) CAL_DOW_SHORT (integer) CAL_DOW_LONG (integer) CAL_MONTH_GREGORIAN_SHORT (integer) CAL_MONTH_GREGORIAN_LONG (integer) CAL_MONTH_JULIAN_SHORT (integer) CAL_MONTH_JULIAN_LONG (integer) CAL_MONTH_JEWISH (integer) CAL_MONTH_FRENCH (integer) 以下常量自 PHP 4.3.0 起可用：

CAL_EASTER_DEFAULT (integer) CAL_EASTER_ROMAN (integer) CAL_EASTER_ALWAYS_GREGORIAN (integer) CAL_EASTER_ALWAYS_JULIAN (integer) 以下常量自 PHP 5.0.0 起可用：

CAL_JEWISH_ADD_ALAFIM_GERESH (integer) CAL_JEWISH_ADD_ALAFIM (integer) CAL_JEWISH_ADD_GERESHAYIM (integer)