Skip to content

Gitlab Testecke / Gitlab Testprojekt

Go to a project
Toggle navigation
Toggle navigation pinning
Switch branch/tag
function.array-keys.html 8.52 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Liefert alle Schl&uuml;ssel oder eine Teilmenge aller Schl&uuml;ssel eines Arrays</title>

 </head>
 <body><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.array-key-exists.html">array_key_exists</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.array-map.html">array_map</a></div>
 <div class="up"><a href="ref.array.html">Array Funktionen</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.array-keys" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">array_keys</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">array_keys</span> &mdash; <span class="dc-title">Liefert alle Schlüssel oder eine Teilmenge aller Schlüssel eines Arrays</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.array-keys-description">
  <h3 class="title">Beschreibung</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">array</span> <span class="methodname"><strong>array_keys</strong></span>
    ( <span class="methodparam"><span class="type">array</span> <code class="parameter">$input</code></span>
   [, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$search_value</code></span>
   [, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$strict</code><span class="initializer"> = false</span></span>
  ]] )</div>

  <p class="para rdfs-comment">
   <span class="function"><strong>array_keys()</strong></span> gibt die Schlüssel (numerisch und als
   String) des Arrays <code class="parameter">input</code> zurück.
  </p>
  <p class="para">
   Ist der optionale Parameter <code class="parameter">search_value</code>
   angegeben, werden nur die Schlüssel für diesen Wert zurückgegeben.
   Andernfalls werden alle Schlüssel von <code class="parameter">input</code>
   zurückgegeben.
  </p>
 </div>


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

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

     <dd>

      <p class="para">
       Ein Array mit den zurückzugebenden Schlüsseln.
      </p>
     </dd>

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

     <dd>

      <p class="para">
       Wenn angegeben, werden nur Schlüssel mit diesen Werten
       zurückgegeben.
      </p>
     </dd>

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

     <dd>

      <p class="para">
       Bestimmt, ob ein strikter Vergleich
       (===) während der Suche verwendet werden soll.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.array-keys-returnvalues">
  <h3 class="title">Rückgabewerte</h3>
  <p class="para">
   Gibt ein Array mit allen Schlüssen des Arrays
   <code class="parameter">input</code> zurück.
  </p>
 </div>

 
 <div class="refsect1 changelog" id="refsect1-function.array-keys-changelog">
  <h3 class="title">Changelog</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>Version</th>
       <th>Beschreibung</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>5.0.0</td>
       <td>
        Der <code class="parameter">strict</code>-Parameter wurde hinzugefügt.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.array-keys-examples">
  <h3 class="title">Beispiele</h3>
  <p class="para">
   <div class="example" id="example-4915">
    <p><strong>Beispiel #1 <span class="function"><strong>array_keys()</strong></span>-Beispiel</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$array&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #0000BB">0&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">100</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"Farbe"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"rot"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_keys</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">$array&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"blau"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"rot"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"grün"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blau"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blau"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_keys</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blau"</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">$array&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"Farbe"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;array(</span><span style="color: #DD0000">"blau"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"rot"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"grün"</span><span style="color: #007700">),<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">"Größe"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;array(</span><span style="color: #DD0000">"klein"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"mittel"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"groß"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_keys</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>Das oben gezeigte Beispiel erzeugt folgende
Ausgabe:</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Array
(
    [0] =&gt; 0
    [1] =&gt; Farbe
)
Array
(
    [0] =&gt; 0
    [1] =&gt; 3
    [2] =&gt; 4
)
Array
(
    [0] =&gt; Farbe
    [1] =&gt; Größe
)
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.array-keys-seealso">
  <h3 class="title">Siehe auch</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.array-values.html" class="function" rel="rdfs-seeAlso">array_values()</a> - Liefert alle Werte eines Arrays</span></li>
    <li class="member"><span class="function"><a href="function.array-key-exists.html" class="function" rel="rdfs-seeAlso">array_key_exists()</a> - Pr&uuml;ft, ob ein Schl&uuml;ssel in einem Array existiert</span></li>
    <li class="member"><span class="function"><a href="function.array-search.html" class="function" rel="rdfs-seeAlso">array_search()</a> - Durchsucht ein Array nach einem Wert und liefert bei Erfolg den
     zugeh&ouml;rigen Schl&uuml;ssel</span></li>
   </ul>
  </p>
 </div>

</div><hr /><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.array-key-exists.html">array_key_exists</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.array-map.html">array_map</a></div>
 <div class="up"><a href="ref.array.html">Array Funktionen</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>