PHP cal_info( )用法及代码示例

PHP中的cal_info()函数是一个内置函数，用于返回有关指定日历的信息。 cal_info()函数返回一个数组，该数组包含calname，month，abbrevmonth和maxdaysinmonth和calsymbol。
它以日历为参数，并返回与指定日历有关的信息。

用法:

cal_info($calendar)

参数：PHP中的cal_info()函数仅接受一个参数$calender。此参数指定一个数字，该数字指示您要了解的日历。以下是可用作此参数值的有效数字列表。

• 0 = CAL_GREGORIAN
• 1 = CAL_JULIAN
• 2 = CAL_JEWISH
• 3 = CAL_FRENCH

返回值：它返回有关指定日历的信息。

错误与异常：

1. 如果在参数中未指定日历，则cal_info()函数将返回有关所有日历的信息。
2. 要将日历指定为cal_info()函数的参数，需要提及其各自的数值而不是日历名称，例如格里高利历的“0”。

以下示例程序旨在说明cal_info()函数。

程序1:：

<?php 
  
// displaying information 
// regarding gregorian calendar 
print_r (cal_info(0)); 
  
?>

输出：

Array
(
    [months] => Array
        (
            [1] => January
            [2] => February
            [3] => March
            [4] => April
            [5] => May
            [6] => June
            [7] => July
            [8] => August
            [9] => September
            [10] => October
            [11] => November
            [12] => December
        )

    [abbrevmonths] => Array
        (
            [1] => Jan
            [2] => Feb
            [3] => Mar
            [4] => Apr
            [5] => May
            [6] => Jun
            [7] => Jul
            [8] => Aug
            [9] => Sep
            [10] => Oct
            [11] => Nov
            [12] => Dec
        )

    [maxdaysinmonth] => 31
    [calname] => Gregorian
    [calsymbol] => CAL_GREGORIAN
)

程序2:：

<?php 
  
// displaying information 
// regarding jewish calendar 
print_r (cal_info(2)); 
  
?>

输出：

Array
(
    [months] => Array
        (
            [1] => Tishri
            [2] => Heshvan
            [3] => Kislev
            [4] => Tevet
            [5] => Shevat
            [6] => Adar I
            [7] => Adar II
            [8] => Nisan
            [9] => Iyyar
            [10] => Sivan
            [11] => Tammuz
            [12] => Av
            [13] => Elul
        )

    [abbrevmonths] => Array
        (
            [1] => Tishri
            [2] => Heshvan
            [3] => Kislev
            [4] => Tevet
            [5] => Shevat
            [6] => Adar I
            [7] => Adar II
            [8] => Nisan
            [9] => Iyyar
            [10] => Sivan
            [11] => Tammuz
            [12] => Av
            [13] => Elul
        )

    [maxdaysinmonth] => 30
    [calname] => Jewish
    [calsymbol] => CAL_JEWISH
)

参考：
http://php.net/manual/en/function.cal-info.php