How to check double fields in multidimensional array?
<p>How to check double fields in multidimensional array?</p>

<p>My array:</p>

<pre><code>    array (
  'welcome' =&gt; 
  array (
    0 =&gt; 
    array (
      'url' =&gt; '/strona-powitalna',
      'component' =&gt; 'welcome',
      'action' =&gt; 'getForumPosts',
      'parameter' =&gt; 
      array (
        0 =&gt; 
        array (
          'name' =&gt; '',
          'type' =&gt; '',
          'default' =&gt; '',
          'method' =&gt; '',
        ),
      ),
      'parameters_all' =&gt; '1',
      'parameters_get' =&gt; 0,
      'parameters_post' =&gt; 0,
    ),
  ),
  'logi' =&gt; 
  array (
  ),
  'main' =&gt; 
  array (
    0 =&gt; 
    array (
      'url' =&gt; '/refresh',
      'component' =&gt; 'main',
      'action' =&gt; 'refreshPlayer',
      'contype' =&gt; 'AJAX',
      'parameter' =&gt; 
      array (
        0 =&gt; 
        array (
          'name' =&gt; '',
          'type' =&gt; '',
          'default' =&gt; '',
          'method' =&gt; '',
        ),
      ),
      'parameters_all' =&gt; '1',
      'parameters_get' =&gt; 0,
      'parameters_post' =&gt; 0,
    ),
  ),
  'account' =&gt; 
  array (
    0 =&gt; 
    array (
      'url' =&gt; '/zmien-kolor',
      'component' =&gt; 'account',
      'action' =&gt; 'changeColorName',
      'contype' =&gt; 'COMMON',
      'parameter' =&gt; 
      array (
        0 =&gt; 
        array (
          'name' =&gt; 'rgb',
          'type' =&gt; 'string',
          'default' =&gt; '',
          'method' =&gt; 'POST',
        ),
      ),
      'parameters_all' =&gt; '1',
      'parameters_get' =&gt; 0,
      'parameters_post' =&gt; 1,
    ),
    1 =&gt; 
    array (
      'url' =&gt; '/kolor-nicku',
      'component' =&gt; 'account',
      'action' =&gt; 'colorName',
      'contype' =&gt; 'COMMON',
      'parameter' =&gt; 
      array (
        0 =&gt; 
        array (
          'name' =&gt; '',
          'type' =&gt; '',
          'default' =&gt; '',
          'method' =&gt; '',
        ),
      ),
      'parameters_all' =&gt; '1',
      'parameters_get' =&gt; 0,
      'parameters_post' =&gt; 0,
    )));
</code></pre>

<p>I must check if parameter url is unique.</p>
