Adding another movie to the movies collection and then running the 
example works as expected.


<?php
$xmlstr = <<<XML
<?xml version='1.0' standalone='yes'?>
<movies>
 <movie>
  <title>PHP: Behind the Parser</title>
  <characters>
   <character>
    <name>Ms. Coder</name>
    <actor>Onlivia Actora</actor>
   </character>
   <character>
    <name>Mr. Coder</name>
    <actor>El Act&#211;r</actor>
   </character>
  </characters>
  <plot>
   So, this language. It's like, a programming language. Or is it a
   scripting language? All is revealed in this thrilling horror spoof
   of a documentary.
  </plot>
  <great-lines>
   <line>PHP solves all my web problems</line>
  </great-lines>
  <rating type="thumbs">7</rating>
  <rating type="stars">5</rating>
 </movie>

 <movie>
  <title>Upfront and personal</title>
  <characters>
   <character>
    <name>Richardo</name>
    <actor>Richard Quadling</actor>
   </character>
   <character>
    <name>Ozzer</name>
    <actor>Oscar Quadling</actor>
   </character>
  </characters>
  <plot>
   With only a few days to go, they get the job done.
  </plot>
  <great-lines>
   <line>A monkey could have done it!</line>
  </great-lines>
  <rating type="thumbs">9</rating>
  <rating type="stars">6</rating>
 </movie>

</movies>
XML;

$xml = new SimpleXMLElement($xmlstr);

/* For each <movie> node, we echo a separate <plot>. */
foreach ($xml->movie as $movie) {
   echo $movie->plot, PHP_EOL;
}
?>


outputs ...


   So, this language. It's like, a programming language. Or is it a
   scripting language? All is revealed in this thrilling horror spoof
   of a documentary.


   With only a few days to go, they get the job done.