<?php
$string = <<<EOF
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE romeoapi SYSTEM "http://www.sherpa.ac.uk/romeo/romeoapi24.dtd">
<romeoapi version="2.9.4">
<header>
<parameters>
<parameter source="specified">
<parametername>id</parametername>
<parametervalue>213213213213213</parametervalue>
</parameter>
<parameter source="default">
<parametername>showfunder</parametername>
<parametervalue>none</parametervalue>
</parameter>
<parameter source="default">
<parametername>fIDnum</parametername>
<parametervalue>|</parametervalue>
</parameter>
<parameter source="default">
<parametername>la</parametername>
<parametervalue>en</parametervalue>
</parameter>
<parameter source="default">
<parametername>versions</parametername>
<parametervalue>legacy</parametervalue>
</parameter>
</parameters>
<apicontrol>identifier</apicontrol>
<outcome>notFound</outcome>
<message />
<licence>SHERPA/RoMEO data is available for re-use under a Creative Commons Attribution-Non-Commercial-Share Alike 2.5 licence. For more details, please see the 'conditions for re-use' at the <licenceurl />, and linked-to from the SHERPA/RoMEO home page.</licence>
<licenceurl>http://www.sherpa.ac.uk/romeoreuse.html</licenceurl>
<disclaimer>All SHERPA/RoMEO information is correct to the best of our knowledge but should not be relied upon for legal advice. SHERPA cannot be held responsible for the re-use of RoMEO data, or for alternative interpretations which are derived from this information.</disclaimer>
<timestamp>16-Oct-2013:15:00:12</timestamp>
</header>
<journals />
<publishers />
</romeoapi>
EOF;
$check = simplexml_load_string($string);
echo($check->header->numhits);