php分析xml实例程序

       
               
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                <><><>]]>
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/*  func.xml.php  2008-09-20  kilobug
必须声明头部属性，xml每个节点的值和属性严禁出现 <、>、" 字符，如需出现，请使用CDATA
每个节点属性必须统一使用单引号'或双引号"
忽略注释，返回一个数组。
*/

$xmlContent = ''; //临时变量

/* 载入xml文件，解析后返回数组 */
function loadXML( $path, $assoc = null, $attrassoc = null ) {
return parseXML( @file_get_contents( $path ), $assoc, $attrassoc );
}
/* 解析XMl内容，返回数组 */
function parseXML( $xmltext, $assoc = null, $attrassoc = null ) {
$xmldata = array();
//转换顶部属性
$noderoot = strpos( $xmltext, ' $noderootspace = strpos( $xmltext, ' ' );
$nodefoot = strpos( $xmltext, '?>' );
$attr = trim( substr($xmltext, $noderootspace, $nodefoot-$noderoot-5) );
//转换节点
$xmldata = array_merge(
   array(
    array_merge(
     array( substr($xmltext, $noderoot+2, $noderootspace-$noderoot-2) ),
     parseXMLAttrs($attr, $attrassoc)
    )
   ),
   parseXMLNodes( trim(substr($xmltext, $nodefoot+2)), $assoc, $attrassoc )
     );
return $xmldata;
}
/* 解析XML节点，返回数组 */
function parseXMLNodes( $nodestr, $assoc = null, $attrassoc = null ) {
global $xmlContent;
$xmlContent = $nodestr;
if ( empty($xmlContent) || !strstr($xmlContent, '<') ) {
  return array();
}
$nodedate = array();
$i = 0;
while ( !empty($xmlContent) ) {
  $noderoot = strpos( $xmlContent, '<' );
  $nodefoot = strpos( $xmlContent, '>' );
  $nodeend = strpos( $xmlContent, '/' );
  $cdataroot = strpos( $xmlContent, '   $cdatafoot = strpos( $xmlContent, ']]>' );
  if ( $noderoot === $cdataroot ) { //判断是否CDATA
   $nodedate = substr($xmlContent, $cdataroot+9, $cdatafoot-$cdataroot-9);
   $xmlContent = substr( $xmlContent, strpos($xmlContent, '>', $cdatafoot+3)+1 );
   break $nodedate;
  } else if ( $noderoot == $nodeend-1 ) { //是否结束节点，是则返回前面的内容
   if ( $i == 0 ) {
    $nodedate = substr( $xmlContent, 0, $noderoot );
    $xmlContent = substr( $xmlContent, $nodefoot+1 );
    return $nodedate;
   }
   else {
    $xmlContent = substr( $xmlContent, $nodefoot+1 );
    break;
   }
  }
  $nodecompart = strpos( $xmlContent, ' ' );
  //判断有无属性
  if ( $nodecompart != false && $nodecompart > $noderoot && $nodecompart < $nodefoot ) { //有属性
   $nodedate[$i][0] = array_merge( array($assoc ? substr($xmlContent, $noderoot+1, $nodecompart-$noderoot-1) : ''), parseXMLAttrs(substr($xmlContent, $nodecompart+1, $nodefoot-$nodecompart-($nodefoot-1 == $nodeend ? 2 : 1)), $attrassoc) );
  
  } else { //无属性
   $nodedate[$i][0] = array( $assoc ? substr($xmlContent, $noderoot+1, $nodefoot-$noderoot-1) : '' );
  }
  $i++;
  $xmlContent = substr( $xmlContent, $nodefoot+1 ); //截取本节点后面内容
  if ( $nodefoot-1 == $nodeend ) { //判断是否单节点
   $nodedate[$i-1][1] = '';
   continue;
  } else {
   $nodedate[$i-1][1] = parseXMLNodes( $xmlContent, $assoc, $attrassoc );
  }
}
return $nodedate;
}
/* 解析XML节点属性，返回数组 */
function parseXMLAttrs( $attrstr, $assoc = null ) {
if ( !$attrstr ) return array();
echo( $attrstr . "n" );
$attrdata = array();
$attrcenter = $attrfoot = 1; //开始转换
$tmpnum = false;
while ( $attrcenter != false ) {
  $tmpnum = strpos($attrstr, '='');
  $attrcenter = strpos($attrstr, '="');
  if ( $tmpnum == false ) {
   $attrfoot = strpos($attrstr, '"', $attrcenter+2);
  } else {
   $attrcenter = $tmpnum;
   $attrfoot = strpos($attrstr, ''', $attrcenter+2);
  }
  if ( $assoc ) { //是否关联数组
   $attrdata[substr( $attrstr, 0, $attrcenter)] = substr( $attrstr, $attrcenter+2, $attrfoot-$attrcenter-2 );
  } else {
   $attrdata[] = substr( $attrstr, $attrcenter+2, $attrfoot-$attrcenter-2 );
  }
  $attrstr = trim(substr($attrstr, $attrfoot+1));
  if ( !$attrstr ) {
   break;
  }
}
return $attrdata;
}

//解析数组为XML（没写）
function parseArrayToXML( $ary ) {
       
}
//解析数组为XML的Nodes（没写）
function parseArrayToXMLNodes( $ary ) {
       
}

/* 测试
$t = microtime();
//loadXML('../books.xml');
print_r( loadXML('../test.xml', 1, 1) ); //自己找一个常见的xml文档
echo microtime() - $t;
*/

?>