The date_sunrise() is an inbuilt function in PHP which is used to find the sunrise time for a specified day and location. This function returns the time of the sunrise, in the specified format, on success. FALSE on failure.
Syntax:
date_sunrise ( $timestamp, $format, $latitude, $longitude, $zenith, $gmtoffset )
Parameters: The date_sunrise() function accepts four parameters as mentioned above and described below:
- $timestamp: It is a mandatory parameter which specifies the timestamp of the day from which the sunrise time is taken.
- $format: It is an optional parameter which specifies format to return the result.
- SUNFUNCS_RET_STRING: Returns a string. e.g. 16:46 (by default)
- SUNFUNCS_RET_DOUBLE: Returns a float. e.g. 16.78243132
- SUNFUNCS_RET_TIMESTAMP: Returns the result as integer (timestamp) e.g. 1095034606.
- $latitude: It is an Optional parameter which specifies the latitude of the location. By default, it set as North. To specify a value for South, pass in a negative value.
- $longitude: It is an Optional parameter which specifies the longitude of the location. By defaults it set as East. To modify a value for West, pass in a negative value.
- $zenith: It is an Optional parameter. The zenith is the angle between the center of the sun and a line perpendicular to earth’s surface. By default it is date.sunrise_zenith.
- $gmtoffset: It is Optional parameter and used to specifies the difference between GMT and local time in hours.
Return Value: It returns the time of sunrise, in the specified format, on success. FALSE on failure.
Exceptions: This function generates E_NOTICE error if date/time function is invalid and E_STRICT or E_WARNING if using the system setting or the TZ environment variable.
Below programs illustrate the date_sunrise() function.
Program 1:
<?php // PHP program to show sunrise time // of New delhi india for current day // Longitude and latitude of Delhi India // 28.6139° N, 77.2090° E // GMT(Greenwich Mean Time) +5.30 // Zenith ~= 90 echo date("D M d Y"); echo("\nsunrise time: "); echo(date_sunrise(time(), SUNFUNCS_RET_STRING, 28.6139, 77.2090, 90, 5.30)); ?> |
Output:
Tue Jun 26 2018 sunrise time: 05:16
Program 2:
<?php // PHP program to show sunrise time // of GFG Noida for a Current day // Longitude and latitude of neveropen Noida // 28°30'04.0"N 77°24'36.0"E // GMT(Greenwich Mean Time) +5.30 // Zenith ~= 90 echo date("D M d Y"); echo("\nsunrise time: "); echo(date_sunrise(time(), SUNFUNCS_RET_STRING, 28.501120, 77.409989, 90, 5.30)); ?> |
Output:
Tue Jun 26 2018 sunrise time: 05:15
Reference: http://php.net/manual/en/function.date-sunrise.php
