title: removing array from multidimensional array
body: <p>I have a session that looks like this:</p>
  
  <pre><code>array(3) {
    ["counter"]=&gt;
    int(0)
    ["currentItem"]=&gt;
    string(1) "2"
    ["addedToCart"]=&gt;
    array(12) {
      [0]=&gt;
      array(11) {
        ["aantal"]=&gt;
        int(1)
        ["id"]=&gt;
        string(1) "1"
        ["filmtitel"]=&gt;
        string(11) "a_bugs_life"
        ["film_id"]=&gt;
        string(1) "2"
        ["zaal_id"]=&gt;
        string(1) "1"
        ["zaaltitel"]=&gt;
        string(6) "zaal 1"
        ["tijdstip"]=&gt;
        string(8) "15:00:00"
        ["stoeltjes"]=&gt;
        string(2) "21"
        ["dag"]=&gt;
        string(8) "woensdag"
        ["verwijder"]=&gt;
        int(2)
        ["vertoningId"]=&gt;
        string(1) "3"
      }
      [1]=&gt;
      array(11) {
        ["aantal"]=&gt;
        int(1)
        ["id"]=&gt;
        string(1) "1"
        ["filmtitel"]=&gt;
        string(11) "a_bugs_life"
        ["film_id"]=&gt;
        string(1) "2"
        ["zaal_id"]=&gt;
        string(1) "1"
        ["zaaltitel"]=&gt;
        string(6) "zaal 1"
        ["tijdstip"]=&gt;
        string(8) "15:00:00"
        ["stoeltjes"]=&gt;
        string(1) "7"
        ["dag"]=&gt;
        string(8) "woensdag"
        ["verwijder"]=&gt;
        int(2)
        ["vertoningId"]=&gt;
        string(1) "3"
      }
      [2]=&gt;
      array(11) {
        ["aantal"]=&gt;
        int(1)
        ["id"]=&gt;
        string(1) "1"
        ["filmtitel"]=&gt;
        string(11) "a_bugs_life"
        ["film_id"]=&gt;
        string(1) "2"
        ["zaal_id"]=&gt;
        string(1) "1"
        ["zaaltitel"]=&gt;
        string(6) "zaal 1"
        ["tijdstip"]=&gt;
        string(8) "15:00:00"
        ["stoeltjes"]=&gt;
        string(2) "22"
        ["dag"]=&gt;
        string(8) "woensdag"
        ["verwijder"]=&gt;
        int(2)
        ["vertoningId"]=&gt;
        string(1) "3"
      }
    }
  }
  </code></pre>
  
  <p>Now, from <code>$_SESSION['addedToCart]</code> I would like to remove arrays if they meet to certain conditions. I have tried the following.</p>
  
  <pre><code>foreach ($_SESSION["addedToCart"] as $arr) {
         if ($arr["stoeltjes"] == $stoeltje &amp;&amp; $arr['film_id'] == $id) {
              unset($arr);
         }
   }
  </code></pre>
  
  <p>This doesn't seem to work, it doesn't remove anything, I did a var_dump to check if the variables $stoeltje and $id were fine and they were fine so that cant be the problem.
  Am I able to use unset in this kind of situation?</p>