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PHP Function date_sunrise()


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Syntax

mixed date_sunrise ( int $timestamp [, 
                     int $format [, float $latitude [, 
                     float $longitude [, float $zenith [, 
                     float $gmt_offset]]]]] )

Definition and Usage

This function returns the sunrise time for a given day (specified as a timestamp) and location.

Paramters

ParameterDescription
timestampRequired. The timestamp of the day from which the sunrise time is taken.
formatOptional,

Optional. Specifies how to return the result:

  • SUNFUNCS_RET_STRING (returns the result as string. e.g. 16:46)
  • SUNFUNCS_RET_DOUBLE (returns the result as float. e.g. 16.78243132)
  • SUNFUNCS_RET_TIMESTAMP (returns the result as integer (timestamp). e.g. 1095034606)
latitude

Optional. Specifies the latitude of the location. The latitude defaults to North. If you want to specify a South value, you must pass a negative value.

longitude

Optional. Specifies the longitude of the location. The longitude defaults to East. If you want to specify a West value, you must pass a negative value.

zenith Optional.
gmt_offset

Optional. Specifies the difference between GMT and local time in hours.

Return Value

Returns the sunrise time in a specified format on success, or FALSE on failure.

Example

Following is the usage of this function:

<?php
/* calculate the sunrise time for Lisbon, Portugal
Latitude: 38.4 North
Longitude: 9 West
Zenith ~= 90
offset: +1 GMT
*/
echo("Date: " . date("D M d Y") . "<br />");
echo("Sunrise time: ");
echo(date_sunrise(time(),SUNFUNCS_RET_STRING,38.4,-9,90,1));
?> 

This will produce following result:

Date: Tue Jan 24 2006
Sunrise time: 08:52

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