function.array-column.html 10.4 KB
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  <title>Return the values from a single column in the input array</title>

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</div><hr /><div id="function.array-column" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">array_column</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.5.0)</p><p class="refpurpose"><span class="refname">array_column</span> &mdash; <span class="dc-title">Return the values from a single column in the input array</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.array-column-description">
  <h3 class="title">Beschreibung</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">array</span> <span class="methodname"><strong>array_column</strong></span>
    ( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
   , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$column_key</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">$index_key</code><span class="initializer"> = null</span></span>
  ] )</div>

  <p class="para rdfs-comment">
   <span class="function"><strong>array_column()</strong></span> returns the values from a single column of
   the <code class="parameter">array</code>, identified by the
   <code class="parameter">column_key</code>. Optionally, you may provide an
   <code class="parameter">index_key</code> to index the values in the returned array by
   the values from the <code class="parameter">index_key</code> column in the input
   array.
  </p>
 </div>

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

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

     <dd>

      <p class="para">
       A multi-dimensional array (record set) from which to pull a column of
       values.
      </p>
     </dd>

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

     <dd>

      <p class="para">
       The column of values to return. This value may be the integer key of the
       column you wish to retrieve, or it may be the string key name for an
       associative array. It may also be <strong><code>NULL</code></strong> to return complete arrays
       (useful together with <code class="parameter">index_key</code> to reindex the
       array).
      </p>
     </dd>

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

     <dd>

      <p class="para">
       The column to use as the index/keys for the returned array. This value
       may be the integer key of the column, or it may be the string key name.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.array-column-returnvalues">
  <h3 class="title">Rückgabewerte</h3>
  <p class="para">
   Returns an array of values representing a single column from the input array.
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.array-column-examples">
  <h3 class="title">Beispiele</h3>
  <p class="para">
   <div class="example" id="example-4892">
    <p><strong>Beispiel #1 Get column of first names from recordset</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">//&nbsp;Array&nbsp;representing&nbsp;a&nbsp;possible&nbsp;record&nbsp;set&nbsp;returned&nbsp;from&nbsp;a&nbsp;database<br /></span><span style="color: #0000BB">$records&nbsp;</span><span style="color: #007700">=&nbsp;array(<br />&nbsp;&nbsp;&nbsp;&nbsp;array(<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'id'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">2135</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'first_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'John'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'last_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Doe'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;),<br />&nbsp;&nbsp;&nbsp;&nbsp;array(<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'id'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">3245</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'first_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Sally'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'last_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Smith'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;),<br />&nbsp;&nbsp;&nbsp;&nbsp;array(<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'id'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">5342</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'first_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Jane'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'last_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Jones'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;),<br />&nbsp;&nbsp;&nbsp;&nbsp;array(<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'id'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">5623</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'first_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Peter'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'last_name'&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">'Doe'</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;)<br />);<br />&nbsp;<br /></span><span style="color: #0000BB">$first_names&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">array_column</span><span style="color: #007700">(</span><span style="color: #0000BB">$records</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'first_name'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$first_names</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; John
    [1] =&gt; Sally
    [2] =&gt; Jane
    [3] =&gt; Peter
)
</pre></div>
    </div>
   </div>
  </p>
  <p class="para">
   <div class="example" id="example-4893">
    <p><strong>Beispiel #2 
     Get column of last names from recordset, indexed by the &quot;id&quot; column
    </strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">//&nbsp;Using&nbsp;the&nbsp;$records&nbsp;array&nbsp;from&nbsp;Example&nbsp;#1<br /></span><span style="color: #0000BB">$last_names&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">array_column</span><span style="color: #007700">(</span><span style="color: #0000BB">$records</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'last_name'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'id'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$last_names</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
(
    [2135] =&gt; Doe
    [3245] =&gt; Smith
    [5342] =&gt; Jones
    [5623] =&gt; Doe
)
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.array-column-seealso">
  <h3 class="title">Siehe auch</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member">
     <a href="https://github.com/ramsey/array_column/blob/master/src/array_column.php" class="link external">&raquo;&nbsp;Recommended
     userland implementation for PHP lower than 5.5</a>
    </li>
   </ul>
  </p>
 </div>
 

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