function.array-slice.html
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<!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>Extrahiert einen Ausschnitt eines Arrays</title>
</head>
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</div><hr /><div id="function.array-slice" class="refentry">
<div class="refnamediv">
<h1 class="refname">array_slice</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">array_slice</span> — <span class="dc-title">Extrahiert einen Ausschnitt eines Arrays</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.array-slice-description">
<h3 class="title">Beschreibung</h3>
<div class="methodsynopsis dc-description">
<span class="type">array</span> <span class="methodname"><strong>array_slice</strong></span>
( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$length</code></span>
[, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$preserve_keys</code><span class="initializer"> = false</span></span>
]] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>array_slice()</strong></span> liefert die mittels
<code class="parameter">offset</code> und <code class="parameter">length</code>
spezifizierte Sequenz von Elementen des Arrays
<code class="parameter">array</code>.
</p>
<blockquote class="note"><p><strong class="note">Hinweis</strong>: <span class="simpara">Diese Funktion setzt
(<span class="function"><a href="function.reset.html" class="function">reset()</a></span>) nach Verwendung den <span class="type"><a href="language.types.array.html" class="type array">array</a></span>-Zeiger
zurück.</span></p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.array-slice-parameters">
<h3 class="title">Parameter-Liste</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">array</code></dt>
<dd>
<p class="para">
Das Eingabe-Array.
</p>
</dd>
<dt>
<code class="parameter">offset</code></dt>
<dd>
<p class="para">
Ist <code class="parameter">offset</code> nicht negativ, beginnt die
Sequenz bei diesem Offset in dem <code class="parameter">array</code>.
Ist <code class="parameter">offset</code> negativ, beginnt die Sequenz
so viele Elemente vor dem Ende von <code class="parameter">array</code>.
</p>
</dd>
<dt>
<code class="parameter">length</code></dt>
<dd>
<p class="para">
Ist <code class="parameter">length</code> angegeben und positiv, enthält
die Sequenz genauso viele Elemente. Ist
<code class="parameter">length</code> angegeben und negativ, endet die
Sequenz so viele Elemente vor dem Ende des Arrays. Wenn nicht
angegeben, enthält die Sequenz alle Elemente von
<code class="parameter">offset</code> bis zum Ende von
<code class="parameter">array</code>.
</p>
</dd>
<dt>
<code class="parameter">preserve_keys</code></dt>
<dd>
<p class="para">
Beachten Sie, dass <span class="function"><strong>array_slice()</strong></span>
standardmäßig Schlüssel des Arrays zurücksetzt und neu vergibt.
Sie können dieses Verhalten ändern, indem Sie
<code class="parameter">preserve_keys</code> auf <strong><code>TRUE</code></strong> setzen.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.array-slice-returnvalues">
<h3 class="title">Rückgabewerte</h3>
<p class="para">
Gibt den Ausschnitt zurück.
</p>
</div>
<div class="refsect1 changelog" id="refsect1-function.array-slice-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>5.0.2</td>
<td>
Der optionale <code class="parameter">preserve_keys</code>-Parameter
wurde hinzugefügt.
</td>
</tr>
</tbody>
</table>
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.array-slice-examples">
<h3 class="title">Beispiele</h3>
<p class="para">
<div class="example" id="example-4941">
<p><strong>Beispiel #1 <span class="function"><strong>array_slice()</strong></span>-Beispiele</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$input </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"a"</span><span style="color: #007700">, </span><span style="color: #DD0000">"b"</span><span style="color: #007700">, </span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #DD0000">"d"</span><span style="color: #007700">, </span><span style="color: #DD0000">"e"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$output </span><span style="color: #007700">= </span><span style="color: #0000BB">array_slice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">); </span><span style="color: #FF8000">// liefert "c", "d" und "e"<br /></span><span style="color: #0000BB">$output </span><span style="color: #007700">= </span><span style="color: #0000BB">array_slice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, -</span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">); </span><span style="color: #FF8000">// liefert "d"<br /></span><span style="color: #0000BB">$output </span><span style="color: #007700">= </span><span style="color: #0000BB">array_slice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">); </span><span style="color: #FF8000">// liefert "a", "b" und "c"<br /><br />// beachten Sie die Unterschiede in den Schlüsseln<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_slice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, -</span><span style="color: #0000BB">1</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_slice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, -</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></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] => c
[1] => d
)
Array
(
[2] => c
[3] => d
)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.array-slice-seealso">
<h3 class="title">Siehe auch</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.array-splice.html" class="function" rel="rdfs-seeAlso">array_splice()</a> - Entfernt einen Teil eines Arrays und ersetzt ihn durch etwas
anderes</span></li>
<li class="member"><span class="function"><a href="function.unset.html" class="function" rel="rdfs-seeAlso">unset()</a> - Löschen einer angegebenen Variablen</span></li>
</ul>
</p>
</div>
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