title: PHP show one select object, from multiple arrays
body: <p>how can i show "prijs" with the number behind it, and leave the rest out. I tried to do this for an experimental school project.
  It should display:</p>
  
  <blockquote>
    <p>prijs: 19.99</p>
    
    <p>prijs: 22.5</p>
    
    <p>prijs: 25.5</p>
  </blockquote>
  
  <pre><code>&lt;?php
  function prijsLijst($titel, $auteur, $genre, $prijs) {
  echo "$prijs de prijs.&lt;br&gt;";
  }
  
  $boeken = array (
  array("titel"=&gt; "Stoner", "auteur" =&gt; "John Williams",
      "genre" =&gt; "fictie", "prijs" =&gt; 19.99),
  array("titel"=&gt; "Stoner", "auteur" =&gt; "John Williams",
      "genre" =&gt; "fictie", "prijs" =&gt; 22.50),
  array("titel"=&gt; "Stoner", "auteur" =&gt; "John Williams",
      "genre" =&gt; "fictie", "prijs" =&gt; 25.50)
      );
  
  ?&gt;
  </code></pre>