function.atan2.html 3.32 KB
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  <title>Arkustangens-Variante mit zwei Parametern</title>

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 <div class="refnamediv">
  <h1 class="refname">atan2</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">atan2</span> &mdash; <span class="dc-title">Arkustangens-Variante mit zwei Parametern</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.atan2-description">
  <h3 class="title">Beschreibung</h3>
   <div class="methodsynopsis dc-description">
    <span class="type">float</span> <span class="methodname"><strong>atan2</strong></span>
     ( <span class="methodparam"><span class="type">float</span> <code class="parameter">$y</code></span>
    , <span class="methodparam"><span class="type">float</span> <code class="parameter">$x</code></span>
    )</div>

  <p class="simpara">
   Diese Funktion berechnet den Arkustangens von
   <code class="parameter">y</code>/<code class="parameter">x</code>.
   Im Gegensatz zu <span class="function"><a href="function.atan.html" class="function">atan()</a></span> kann sie dabei
   die Vorzeichen beider Parameter beachten und so den Quadranten
   des Ergebnisses bestimmen.
  </p>
  <p class="simpara">
   Die Funktion gibt das Ergebnis im Bogenmaß zurück, d.h. zwischen
   -PI und PI (inklusive).
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.atan2-parameters">
  <h3 class="title">Parameter-Liste</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">y</code></dt>

     <dd>

      <p class="para">
       Dividend
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">x</code></dt>

     <dd>

      <p class="para">
       Divisor
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.atan2-returnvalues">
  <h3 class="title">Rückgabewerte</h3>
  <p class="para">
   Der Arkustangens von <code class="parameter">y</code>/<code class="parameter">x</code>
   in Bogenmaß
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.atan2-seealso">
  <h3 class="title">Siehe auch</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.atan.html" class="function" rel="rdfs-seeAlso">atan()</a> - Arkustangens</span></li>
   </ul>
  </p>
 </div>

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