function.array-splice.html

php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容

 is specified and is negative then
       the end of the removed portion will be that many elements from
       the end of the array.  Tip: to remove everything from
       <i><tt class="parameter">offset</tt></i>
 to the end of the array when
       <i><tt class="parameter">replacement</tt></i>
 is also specified, use
       <i>count($input)</i> for
       <i><tt class="parameter">length</tt></i>
.
      </p>
     </dd>

    </dt>

    <dt>

     <span class="term"><i><tt class="parameter">replacement</tt></i>
</span>

     <dd>

      <p class="para">
       If <i><tt class="parameter">replacement</tt></i>
 array is specified, then the
       removed elements are replaced with elements from this array.
      </p>
      <p class="para">
       If <i><tt class="parameter">offset</tt></i>
 and <i><tt class="parameter">length</tt></i>

       are such that nothing is removed, then the elements from the
       <i><tt class="parameter">replacement</tt></i>
 array are inserted in the place
       specified by the <i><tt class="parameter">offset</tt></i>
. Note that keys in
       replacement array are not preserved.
      </p>
      <p class="para">
       If <i><tt class="parameter">replacement</tt></i>
 is just one element it is
       not necessary to put <i>array()</i>
       around it, unless the element is an array itself.
      </p>
     </dd>

    </dt>

   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues">
  <h3 class="title">Return Values</h3>
  <p class="para">
   Returns the array consisting of the extracted elements.
  </p>
 </div>

 <div class="refsect1 examples">
  <h3 class="title">Examples</h3>
  <p class="para">
   <div class="example">
    <p><b>Example #1 <b>array_splice()</b> examples</b></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$input&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"red"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"green"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blue"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"yellow"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">2</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">//&nbsp;$input&nbsp;is&nbsp;now&nbsp;array("red",&nbsp;"green")<br /><br /></span><span style="color: #0000BB">$input&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"red"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"green"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blue"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"yellow"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;-</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">//&nbsp;$input&nbsp;is&nbsp;now&nbsp;array("red",&nbsp;"yellow")<br /><br /></span><span style="color: #0000BB">$input&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"red"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"green"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blue"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"yellow"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">count</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">),&nbsp;</span><span style="color: #DD0000">"orange"</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">//&nbsp;$input&nbsp;is&nbsp;now&nbsp;array("red",&nbsp;"orange")<br /><br /></span><span style="color: #0000BB">$input&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"red"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"green"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blue"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"yellow"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;-</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;array(</span><span style="color: #DD0000">"black"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"maroon"</span><span style="color: #007700">));<br /></span><span style="color: #FF8000">//&nbsp;$input&nbsp;is&nbsp;now&nbsp;array("red",&nbsp;"green",<br />//&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"blue",&nbsp;"black",&nbsp;"maroon")<br /><br /></span><span style="color: #0000BB">$input&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"red"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"green"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"blue"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"yellow"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">3</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"purple"</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">//&nbsp;$input&nbsp;is&nbsp;now&nbsp;array("red",&nbsp;"green",<br />//&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"blue",&nbsp;"purple",&nbsp;"yellow");<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
  <p class="para">
   <div class="example">
    <p><b>Example #2 <b>array_splice()</b> examples</b></p>
    <div class="example-contents"><p>
     The following statements change the values of <var class="varname">$input</var>
     the same way:
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />array_push</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$x</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$y</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">count</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;array(</span><span style="color: #0000BB">$x</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$y</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">array_pop</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;-</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_shift</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_unshift</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$x</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$y</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;array(</span><span style="color: #0000BB">$x</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$y</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">$input</span><span style="color: #007700">[</span><span style="color: #0000BB">$x</span><span style="color: #007700">]&nbsp;=&nbsp;</span><span style="color: #0000BB">$y</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;for&nbsp;arrays&nbsp;where&nbsp;key&nbsp;equals&nbsp;offset<br /></span><span style="color: #0000BB">array_splice</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$x</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$y</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>

 <div class="refsect1 seealso">
  <h3 class="title">See Also</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="function.array-slice.html" class="function" rel="rdfs-seeAlso">array_slice()</a></li>
    <li class="member"><a href="function.unset.html" class="function" rel="rdfs-seeAlso">unset()</a></li>
    <li class="member"><a href="function.array-merge.html" class="function" rel="rdfs-seeAlso">array_merge()</a></li>
   </ul>
  </p>
 </div>

</div><hr /><div style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.array-slice.html">array_slice</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.array-sum.html">array_sum</a></div>
 <div class="up"><a href="ref.array.html">Array Functions</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>