title: PHP array, Are array indexes case sensitive?
body: <p>I don't know if this is a problem yet but wanted to start thinking about it.</p>
  
  <p>Question:</p>
  
  <p>"<strong>Are PHP array indexes case sensitive</strong>"?</p>
  
  <p>Example:</p>
  
  <pre><code>$a=array("a"=&gt;"Dog","b"=&gt;"Cat","c"=&gt;"Horse","A"=&gt;"Dog","B"=&gt;"Cat","C"=&gt;"Horse");
  print_r($a);
  </code></pre>
  
  <p>Results:</p>
  
  <pre><code>Array ( [a] =&gt; Dog [b] =&gt; Cat [c] =&gt; Horse [A] =&gt; Dog [B] =&gt; Cat [C] =&gt; Horse ) 
  </code></pre>
  
  <p>I've run a couple of examples and this seems to hold true, just wanted to make sure that I'm seeing this correctly.</p>