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# PHP Function unixtojd ()

## Syntax

unixtojd ( [$timestamp] );

## Definition and Usage

Return the Julian Day for a Unix timestamp (seconds since 1.1.1970), or for the current day if no timestamp is given.

## Paramters

Parameter | Description
--- | ---
timestamp | Optional. A unix timestamp to convert.

## Return Value

A julian day number as integer.

## Example

Try out following example:

    <?php
    echo(unixtojd());
    ?>

This will produce following result:

    2453855

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