How to construct a nested associative array
<p>I am trying to construct a deeply nested associative array but i don't know what the rules are in constructing one.I have this theoritical array:</p>

<pre><code>-one
-two
-three
-four
    -one
    -two
    -three
    -four
-five
-six
-seven
-eight
-nine
    -one
    -two            
    -three 
            -one
            -two
            -three
            -four
            -five
            -six
</code></pre>

<p>and i made this attempt at representing that as a php associative array;</p>

<pre><code>$associative = array(
'one' =&gt; 'one-1',
'two' =&gt; 'two-2',
'three' =&gt; 'three-3',
'four' =&gt; 'four-4'
(
    'one' =&gt; 'one-four-1',
    'two' =&gt; 'two-four-2',
    'three' =&gt; 'three-four-3',
    'four' =&gt; 'four-four-4'
)
'five' =&gt; 'five-5',
'six' =&gt; 'six-6',
'seven' =&gt; 'seven-7',
'eight' =&gt; 'eight-8',
'nine' =&gt; 'nine-9'
(
    'one' =&gt; 'one-nine-1',
    'two' =&gt; 'two-nine-2',          
    'three' =&gt; 'three-nine-3' 
(   
        'one' =&gt; 'one-nine-three-1',
        'two' =&gt; 'two-nine-three-2',
        'three' =&gt; 'three-nine-three-3',
        'four' =&gt; 'four-nine-three-4',
        'five' =&gt; 'five-nine-three-5',
        'six' =&gt; 'six-nine-three-6'
))
);
$keys = array_values($associative);
echo $keys[0];
</code></pre>

<p>When i try executing the php snippet i get this error;</p>

<blockquote>
  <p>Parse error: syntax error, unexpected '(', expecting ')' in
  C:\wamp\www\array.php on line 7</p>
</blockquote>

<p>So my question is,what is the correct way of writing such an array and what rule should i follow when i wish to add more children?.</p>

<p>Note:In my theoritical array,four has four children,nine has three children and three has six children.Anyway,i hope the idea of having children is understood in my dummy array.</p>
