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<h1>PHP array_unshift() Function</h1>
<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>
<hr />

<h2>Definition and Usage</h2>

<p>The array_unshift() function inserts new elements to an array. The new array 
values will be inserted in the beginning of the array. The function's return 
value is the new number of elements in the array (See example 2).</p>

<h2>Syntax</h2>

<table class="ex" cellspacing="0" border="1" width="100%">
  <tr>
    <td>
    <pre>array_unshift(array,value1,value2,value3...)</pre>
    </td>
</tr>
</table>
<br />

<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3"> 
  <tr>
    <th align="left" valign="top" width="20%">Parameter</th>
    <th align="left" valign="top" width="80%">Description</th>
  </tr>  
  <tr>
    <td valign="top">array</td>
    <td valign="top">Required. Specifying an array</td>
  </tr>
  <tr>
    <td valign="top">value1</td>
    <td valign="top">Required. Specifies a value to insert</td>
  </tr>
	<tr>
    <td valign="top">value2</td>
    <td valign="top">Optional. Specifies a value to insert</td>
  </tr>
  <tr>
    <td valign="top">value3</td>
    <td valign="top">Optional. Specifies a value to insert</td>
  </tr>
  </table>
<br />


<hr />

<h2>Tips and Notes</h2>

<p><b>Tip:</b> You can add one value, or as many as you like.</p>
<p><b>Note:</b> Numeric keys will start at 0 and increas by 1 (See 
example3). String keys will remain the same (See example 1).</p>
<hr />

<h2>Example 1</h2>

<table class="ex" cellspacing="0" border="1" width="100%" id="table5">
  <tr>
    <td>
    <pre>&lt;?php
$a=array(&quot;a&quot;=&gt;&quot;Cat&quot;,&quot;b&quot;=&gt;&quot;Dog&quot;);
array_unshift($a,&quot;Horse&quot;);
print_r($a);
?&gt;</pre>
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</tr>
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