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PHP Basic

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PHP Install

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PHP Syntax

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PHP Comments

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PHP Data Types

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PHP Casting

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PHP Math

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PHP Superglobals

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PHP Form

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PHP Advanced

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PHP OOP

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MySQL Database

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PHP XML

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PHP Reference

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Text lesson

unixtojd()

Example

Convert a Unix timestamp to a Julian Day Number.

<?php
echo unixtojd();
?>

Definition and Usage

The unixtojd() function converts a Unix timestamp to a Julian Day Number.

Note: A Unix timestamp represents the number of seconds elapsed since midnight on January 1, 1970 (Gregorian Calendar).

Tip: Use the jdtounix() function to convert a Julian Day Number to a Unix timestamp.

Syntax

unixtojd(timestamp);

Parameter Values

Parameter	Description
timestamp	Optional. Specifies the Unix timestamp to be converted.

Technical Details

Return Value:	Returns the Julian Day Number for a given Unix timestamp (seconds since January 1, 1970), or for the current day if no timestamp is provided.
PHP Version:	4+