XML文件空格符有关问题

<br /><?xml version="1.0" encoding="utf-8"?><br /><Location><br />  <CountryRegion Name="Afghanistan" Code="AFG"><br />    <State ><br />      <City Name="Herat" Code="HEA"/><br />      <City Name="Kabul" Code="KBL"/><br />      <City Name="Kandahar" Code="KDH"/><br />      <City Name="Mazar-i Sharif" Code="MZR"/><br />    </State><br />  </CountryRegion><br />  <CountryRegion Name="Aland lslands" Code="ALA" /><br /><CountryRegion Name="United?States" Code="USA"><br />    <State Name="Alabama" Code="AL"><br /></CountryRegion><br />

$s = file_get_contents('D:\我的文档\Downloads\全球各国省市（英文版）.xml');<br /><br />preg_match_all('/United.+/m', $s, $m);<br />foreach($m[0] as $v) {<br />  echo "$v\n";<br />  echo bin2hex($v), PHP_EOL;<br />}

preg_match_all('/.+\xc2\xa0.+/m', $s, $m);<br />foreach($m[0] as $v) {<br />  echo "$v\n";<br />  echo bin2hex($v), PHP_EOL;<br />}