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PHP Function date_sunrise()
Syntax
mixed date_sunrise ( int $timestamp [,
int $format [, float $latitude [,
float $longitude [, float $zenith [,
float $gmt_offset]]]]] )
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Definition and Usage
This function returns the sunrise time for a given day (specified as a timestamp) and location.
Paramters
Parameter | Description |
timestamp | Required. The timestamp of the day from which the sunrise time is taken. |
format | Optional, 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)
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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.
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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));
?>
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This will produce following result:
Date: Tue Jan 24 2006
Sunrise time: 08:52
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