title: array child in php
body: <p>i have this array
  the name of array is $list</p>
  
  <p>when i type this:</p>
  
  <pre><code>$mychild = $list[1]['children'];
  </code></pre>
  
  <p>but if there is no child i get this message</p>
  
  <p><em>A PHP Error was encountered
  Severity: Notice
  Message: Undefined index: children
  Filename: controllers/user.php
  Line Number: 384</em></p>
  
  <p>how i can check if there is child in array items?</p>
  
  <pre><code>Array
      (    
          [0] =&gt; Array
              (
                  [id] =&gt; 7
                  [children] =&gt; Array
                      (
                          [0] =&gt; Array
                              (
                                  [id] =&gt; 9
                              )
  
                      )
  
              )
  
          [1] =&gt; Array
              (
                  [id] =&gt; 6
              )
  
          [2] =&gt; Array
              (
                  [id] =&gt; 8
              )
  
          [3] =&gt; Array
              (
                  [id] =&gt; 10
              )
  
      )
  </code></pre>