func_array_walk.asp

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  </table>
<br />


<hr />

<h2>Tips and Notes</h2>

<p><b>Tip:</b> You can assign one parameter to the function, or as many as you like.</p>

<p><b>Note:</b> You can change an array element's value in the user-made function 
by specifying the first parameter as a reference: &amp;$value. (See example 3)</p>


<hr />

<h2>Example 1</h2>

<table class="ex" cellspacing="0" border="1" width="100%" id="table13">
  <tr>
    <td>
    <pre>&lt;?php
function myfunction($value,$key) 
{
echo &quot;The key $key has the value $value&lt;br /&gt;&quot;;
}
$a=array(&quot;a&quot;=&gt;&quot;Cat&quot;,&quot;b&quot;=&gt;&quot;Dog&quot;,&quot;c&quot;=&gt;&quot;Horse&quot;);
array_walk($a,&quot;myfunction&quot;);
?&gt;</pre>
    </td>
</tr>
</table>

<p>The output of the code above will be:</p>

<table class="ex" cellspacing="0" border="1" width="100%" id="table14">
  <tr>
    <td>
    <pre>The key a has the value Cat
The key b has the value Dog
The key c has the value Horse</pre>
    </td>
</tr>
</table>

<br />
<hr />

<h2>Example 2</h2>
<p>With a parameter:</p>

<table class="ex" cellspacing="0" border="1" width="100%" id="table17">
  <tr>
    <td>
    <pre>&lt;?php
function myfunction($value,$key,$p) 
{
echo &quot;$key $p $value&lt;br /&gt;&quot;;
}
$a=array(&quot;a&quot;=&gt;&quot;Cat&quot;,&quot;b&quot;=&gt;&quot;Dog&quot;,&quot;c&quot;=&gt;&quot;Horse&quot;);
array_walk($a,&quot;myfunction&quot;,&quot;has the value&quot;);
?&gt;</pre>
    </td>
</tr>
</table>

<p>The output of the code above will be:</p>

<table class="ex" cellspacing="0" border="1" width="100%" id="table18">
  <tr>
    <td>
    <pre>a has the value Cat
b has the value Dog
c has the value Horse</pre>
    </td>
</tr>
</table>

<br />
<hr />

<h2>Example 3</h2>
<p>Change an array element's value. (Notice the &amp;$value)</p>

<table class="ex" cellspacing="0" border="1" width="100%" id="table9">
  <tr>
    <td>
    <pre>&lt;?php
function myfunction(&amp;$value,$key) 
{
$value=&quot;Bird;
}
$a=array(&quot;a&quot;=&gt;&quot;Cat&quot;,&quot;b&quot;=&gt;&quot;Dog&quot;,&quot;c&quot;=&gt;&quot;Horse&quot;);
array_walk($a,&quot;myfunction&quot;);
print_r($a);
?&gt;</pre>
    </td>
</tr>
</table>

<p>The output of the code above will be:</p>

<table class="ex" cellspacing="0" border="1" width="100%" id="table10">
  <tr>
    <td>
    <pre>Array ( [a] => Bird [b] => Bird [c] => Bird ) 
</pre>
    </td>
</tr>
</table>

<br />
<hr />

<a href="php_ref_array.asp"><img class="navup" src="../images/up.gif" alt="PHP Array Reference" border="0" /> Complete PHP Array Reference</a>

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