php-doc-en/reference/datetime/functions/date-sunrise.xml

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<refentry xml:id="function.date-sunrise" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>date_sunrise</refname>
  <refpurpose>Returns time of sunrise for a given day and location</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>date_sunrise</methodname>
   <methodparam><type>int</type><parameter>timestamp</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>format</parameter><initializer>SUNFUNCS_RET_STRING</initializer></methodparam>
   <methodparam choice="opt"><type>float</type><parameter>latitude</parameter><initializer>ini_get("date.default_latitude")</initializer></methodparam>
   <methodparam choice="opt"><type>float</type><parameter>longitude</parameter><initializer>ini_get("date.default_longitude")</initializer></methodparam>
   <methodparam choice="opt"><type>float</type><parameter>zenith</parameter><initializer>ini_get("date.sunrise_zenith")</initializer></methodparam>
   <methodparam choice="opt"><type>float</type><parameter>gmt_offset</parameter><initializer>0</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>date_sunrise</function> returns the sunrise time for a given
   day (specified as a <parameter>timestamp</parameter>) and location.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>timestamp</parameter></term>
     <listitem>
      <para>
       The <parameter>timestamp</parameter> of the day from which the sunrise
       time is taken.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>format</parameter></term>
     <listitem>
      <para>
       <table>
        <title><parameter>format</parameter> constants</title>
        <tgroup cols="2">
         <thead>
          <row>
           <entry>constant</entry>
           <entry>description</entry>
           <entry>example</entry>
          </row>
         </thead>
         <tbody>
          <row>
           <entry>SUNFUNCS_RET_STRING</entry>
           <entry>returns the result as <type>string</type></entry>
           <entry>16:46</entry>
          </row>
          <row>
           <entry>SUNFUNCS_RET_DOUBLE</entry>
           <entry>returns the result as <type>float</type></entry>
           <entry>16.78243132</entry>
          </row>
          <row>
           <entry>SUNFUNCS_RET_TIMESTAMP</entry>
           <entry>returns the result as <type>integer</type> (timestamp)</entry>
           <entry>1095034606</entry>
          </row>
         </tbody>
        </tgroup>
       </table>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>latitude</parameter></term>
     <listitem>
      <para>
       Defaults to North, pass in a negative value for South.
       See also: <literal>date.default_latitude</literal>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>longitude</parameter></term>
     <listitem>
      <para>
       Defaults to East, pass in a negative value for West.
       See also: <literal>date.default_longitude</literal>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>zenith</parameter></term>
     <listitem>
      <para>
       Default: <literal>date.sunrise_zenith</literal>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>gmtoffset</parameter></term>
     <listitem>
      <para>
       Specified in hours.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the sunrise time in a specified <parameter>format</parameter> on
   success&return.falseforfailure;.
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
   
   &date.timezone.errors.description;
 
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      
      &date.timezone.errors.changelog;
     
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>date_sunrise</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php

/* calculate the sunrise time for Lisbon, Portugal
Latitude: 38.4 North
Longitude: 9 West
Zenith ~= 90
offset: +1 GMT
*/

echo date("D M d Y"). ', sunrise time : ' .date_sunrise(time(), SUNFUNCS_RET_STRING, 38.4, -9, 90, 1);

?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
Mon Dec 20 2004, sunrise time : 08:54
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>date_sunset</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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