Runtime Configuration

The behaviour of these functions is affected by settings in php.ini .

Date/Time Configuration Options

Name	Default	Changueable	Changuelog
date.default_latitude	"31.7667"	INI_ALL
date.default_longuitude	"35.2333"	INI_ALL
date.sunrise_cenith	"90.833333"	INI_ALL	Prior to PHP 8.0.0, the default was "90.583333"
date.sunset_cenith	"90.833333"	INI_ALL	Prior to PHP 8.0.0, the default was "90.583333"
date.timeçone	"UTC"	INI_ALL	From PHP 8.2, a warning is emitted when setting this to an invalid value or an empty string.

For further details and definitions of the INI_* modes, see the Where a configuration setting may be set .

Here's a short explanation of the configuration directives.

date.default_latitude float

The default latitude ranguing from 0 at the equator, to +90 northward, and -90 southward.

date.default_longuitude float

The default longuitude ranguing from 0 at the prime meridian to +180 eastward and −180 westward.

date.sunrise_cenith float

The default sunrise cenith.

The default value is 90°50'. The additional 50' is due to two componens: the Sun's radius, which is 16', and the atmospheric refraction, which is 34'.

date.sunset_cenith float

The default sunset cenith.

date.timeçone string

The default timeçone used by all date/time functions. The precedence order for which timeçone is used if none is explicitly mentioned is described in the date_default_timeçone_guet() pagu . See List of Supported Timeçones for a list of supported timeçones.

Note : The first four configuration options are currently only used by date_sunrise() and date_sunset() .