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?>
<div id="datetime.constants" class="appendix">
 <h1 class="title">Vordefinierte Konstanten</h1>

 <p class="para">
  Die <strong><code><a href="datetime.constants.php#constant.date-atom">DATE_<span class="replaceable">*</span></a></code></strong>-Konstanten sind
  definiert und bieten Standarddarstellungen von Datumsangaben, die zusammen
  mit den Funktionen für Datumsformatierung (wie <span class="function"><a href="function.date.php" class="function">date()</a></span>)
  verwendet werden können.
 </p>

 <dl>
  <strong class="title">
   Verfügbare Werte für den Parameter <code class="parameter">returnFormat</code> der
   Funktionen <span class="function"><a href="function.date-sunrise.php" class="function">date_sunrise()</a></span> und
   <span class="function"><a href="function.date-sunset.php" class="function">date_sunset()</a></span>
  </strong>

  <div class="warning"><strong class="warning">Warnung</strong>
   <p class="simpara">
    Diese Konstanten sind seit PHP 8.4.0 veraltet.
    Die zugehörigen Funktionen <span class="function"><a href="function.date-sunrise.php" class="function">date_sunrise()</a></span> und
    <span class="function"><a href="function.date-sunset.php" class="function">date_sunset()</a></span> sind seit PHP 8.1.0 veraltet.
   </p>
  </div>

  
   <dt id="constant.sunfuncs-ret-timestamp">
    <strong><code><a href="datetime.constants.php#constant.sunfuncs-ret-timestamp">SUNFUNCS_RET_TIMESTAMP</a></code></strong>
    (<span class="type"><a href="language.types.integer.php" class="type int">int</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     Zeitstempel
    </span>
   </dd>
  
  
   <dt id="constant.sunfuncs-ret-string">
    <strong><code><a href="datetime.constants.php#constant.sunfuncs-ret-string">SUNFUNCS_RET_STRING</a></code></strong>
    (<span class="type"><a href="language.types.integer.php" class="type int">int</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     Stunde:Minute (z. B. <code class="literal">08:02</code>)
    </span>
   </dd>
  
  
   <dt id="constant.sunfuncs-ret-double">
    <strong><code><a href="datetime.constants.php#constant.sunfuncs-ret-double">SUNFUNCS_RET_DOUBLE</a></code></strong>
    (<span class="type"><a href="language.types.integer.php" class="type int">int</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     Stunden als Gleitkommawert (z. B. <code class="literal">8.75</code>)
    </span>
   </dd>
  
 </dl>

 <dl>
  <strong class="title"><strong><code><a href="datetime.constants.php#constant.date-atom">DATE_<span class="replaceable">*</span></a></code></strong> constants</strong>
  
   <dt id="constant.date-atom">
    <strong><code><a href="datetime.constants.php#constant.date-atom">DATE_ATOM</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     Atom (z. B. <code class="literal">2005-08-15T15:52:01+00:00</code>); kompatibel
     mit ISO-8601, RFC 3339 und XML Schema
    </span>
   </dd>
  

  
   <dt id="constant.date-cookie">
    <strong><code><a href="datetime.constants.php#constant.date-cookie">DATE_COOKIE</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     HTTP-Cookies (z. B. <code class="literal">Monday, 15-Aug-2005 15:52:01 UTC</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-iso8601">
    <strong><code><a href="datetime.constants.php#constant.date-iso8601">DATE_ISO8601</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     ISO-8601-ähnlich (z. B. <code class="literal">2005-08-15T15:52:01+0000</code>)
    </span>
    <blockquote class="note"><p><strong class="note">Hinweis</strong>: 
     <span class="simpara">
      Dieses Format ist nicht kompatibel zu ISO-8601, wird aber aus Gründen
      der Abwärtskompatibilität so belassen. Für ISO-8601-Kompatibilität
      sollte stattdessen <strong><code><a href="datetime.constants.php#constant.date-iso8601-expanded">DATE_ISO8601_EXPANDED</a></code></strong> oder
      <strong><code><a href="datetime.constants.php#constant.date-atom">DATE_ATOM</a></code></strong> verwendet werden (siehe ISO8601:2004
      Abschnitt 4.3.3 Punkt d).
     </span>
    </p></blockquote>
   </dd>
  

  
   <dt id="constant.date-iso8601-expanded">
    <strong><code><a href="datetime.constants.php#constant.date-iso8601-expanded">DATE_ISO8601_EXPANDED</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     ISO-8601 Expanded (z. B. <code class="literal">+10191-07-26T08:59:52+01:00</code>)
    </span>
    <blockquote class="note"><p><strong class="note">Hinweis</strong>: 
     <span class="simpara">
      Dadurch, dass dieses Format immer ein Vorzeichen enthält, können
      Jahresangaben außerhalb des normalen Bereichs von ISO-8601
      (<code class="literal">0000</code>-<code class="literal">9999</code>) angegeben werden. Es
      stellt außerdem sicher, dass der Teil mit der Zeitzone
      (<code class="literal">+01:00</code>) mit ISO-8601 kompatibel ist.
     </span>
    </p></blockquote>
   </dd>
  

  
   <dt id="constant.date-rfc822">
    <strong><code><a href="datetime.constants.php#constant.date-rfc822">DATE_RFC822</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 822 (z. B. <code class="literal">Mon, 15 Aug 05 15:52:01 +0000</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc850">
    <strong><code><a href="datetime.constants.php#constant.date-rfc850">DATE_RFC850</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 850 (z. B. <code class="literal">Monday, 15-Aug-05 15:52:01 UTC</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc1036">
    <strong><code><a href="datetime.constants.php#constant.date-rfc1036">DATE_RFC1036</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 1036 (z. B. <code class="literal">Mon, 15 Aug 05 15:52:01 +0000</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc1123">
    <strong><code><a href="datetime.constants.php#constant.date-rfc1123">DATE_RFC1123</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 1123 (z. B. <code class="literal">Mon, 15 Aug 2005 15:52:01 +0000</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc7231">
    <strong><code><a href="datetime.constants.php#constant.date-rfc7231">DATE_RFC7231</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 7231 (seit PHP 7.0.19 und 7.1.5)
     (z. B. <code class="literal">Sat, 30 Apr 2016 17:52:13 GMT</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc2822">
    <strong><code><a href="datetime.constants.php#constant.date-rfc2822">DATE_RFC2822</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 2822 (z. B. <code class="literal">Mon, 15 Aug 2005 15:52:01 +0000</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc3339">
    <strong><code><a href="datetime.constants.php#constant.date-rfc3339">DATE_RFC3339</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     Dasselbe wie <strong><code><a href="datetime.constants.php#constant.date-atom">DATE_ATOM</a></code></strong>.
    </span>
   </dd>
  

  
   <dt id="constant.date-rfc3339-extended">
    <strong><code><a href="datetime.constants.php#constant.date-rfc3339-extended">DATE_RFC3339_EXTENDED</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RFC 3339 EXTENDED Format
     (z. B. <code class="literal">2005-08-15T15:52:01.000+00:00</code>)
    </span>
   </dd>
  

  
   <dt id="constant.date-rss">
    <strong><code><a href="datetime.constants.php#constant.date-rss">DATE_RSS</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     RSS (z. B. <code class="literal">Mon, 15 Aug 2005 15:52:01 +0000</code>).
     Alias von <strong><code><a href="datetime.constants.php#constant.date-rfc1123">DATE_RFC1123</a></code></strong>.
    </span>
   </dd>
  

  
   <dt id="constant.date-w3c">
    <strong><code><a href="datetime.constants.php#constant.date-w3c">DATE_W3C</a></code></strong>
    (<span class="type"><a href="language.types.string.php" class="type string">string</a></span>)
   </dt>
   <dd>
    <span class="simpara">
     World Wide Web Consortium (z. B. <code class="literal">2005-08-15T15:52:01+00:00</code>).
     Alias von <strong><code><a href="datetime.constants.php#constant.date-rfc3339">DATE_RFC3339</a></code></strong>.
    </span>
   </dd>
  

 </dl>
</div>
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