title: Ajax request returns undefined
body: <p>I have the following ajax request:</p>
  
  <pre><code>$.ajax({
      type:'POST',
      url:'../php/anmelden_info.php',
      data:{
          kat :  'Freizeitfussballer'
      },
      success: function(data){
          alert(data[0].anmelde_info);
      }
  });
  </code></pre>
  
  <p>which alerts <code>undefined</code> but i don't know why, because when I go the my console and look for the answer I get:</p>
  
  <pre><code>[{"kategorien_id":"3","kat_name":"Fasnacht","anmelde_info":"\n&lt;b&gt;Informationen:.... ......&lt;\/b&gt;\n&lt;br \/&gt;\nDer Turniereinsatz betr\u00e4gt 100.- pro Mannschaft."}]
  </code></pre>
  
  <p>and I have no idea what I'm doing wrong!</p>