title: extract an array from a multidimensional array
body: <p>So here is my array:</p>
  
  <blockquote>
    <p>array(1) { [0]=> string(79) "{"form_array":{"element1":"value1","element2":"value2","element3":"value3"}}" } </p>
  </blockquote>
  
  <p>How can I extract "form_array" as an array? </p>