PHP cal_info() Function: Usage and Examples

Returns calendar names and month information for supported calendars.

What Is cal_info() in PHP?

Returns calendar names and month information for supported calendars.

Its syntax is:

cal_info(int $calendar = -1): array

Parameters:

• $calendar — Accepted as int; optional default -1.

Return type: array. The result structure differs when requesting all calendars rather than one.

Availability: Requires the calendar extension.

Example 1: Basic Usage

<?php

print_r(cal_info(CAL_GREGORIAN)["months"]);

Output:

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
)

The result structure differs when requesting all calendars rather than one.

Example 2: A Different Input

<?php

echo cal_info(CAL_JULIAN)["calname"];

Output:

Julian

The result structure differs when requesting all calendars rather than one.

Practical Example: Applying It in a Program

<?php

$calendarInfo = cal_info(CAL_GREGORIAN); echo $calendarInfo["calname"] . ": " . count($calendarInfo["months"]);

Output:

Gregorian: 12

The result structure differs when requesting all calendars rather than one.

Important Behavior and Edge Cases

• Key behavior: The result structure differs when requesting all calendars rather than one.
• Environment: Requires the calendar extension.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Returns calendar names and month information for supported calendars.
• The result structure differs when requesting all calendars rather than one.
• Requires the calendar extension.

Summary: The result structure differs when requesting all calendars rather than one.