php读取XML的常见方法实例总结

<&＃63;xml version="1.0 encoding="UTF-8"&＃63;>

   
     张映
     男
     28
   
   
     tank
     男
     28
   

<&＃63;php
   $doc = new DOMDocument();
   $doc->load('person.xml'); //读取xml文件
   $humans = $doc->getElementsByTagName( "humans" ); //取得humans标签的对象数组
   foreach( $humans as $human )
   {
     $names = $human->getElementsByTagName( "name" ); //取得name的标签的对象数组
     $name = $names->item(0)->nodeValue; //取得node中的值，如 
     $sexs = $human->getElementsByTagName( "sex" );
     $sex = $sexs->item(0)->nodeValue;
     $olds = $human->getElementsByTagName( "old" );
     $old = $olds->item(0)->nodeValue;
     echo "$name - $sex - $old\n";
   }
&＃63;>

<&＃63;php
   $xml_array=simplexml_load_file('person.xml'); //将XML中的数据,读取到数组对象中
   foreach($xml_array as $tmp){
     echo $tmp->name."-".$tmp->sex."-".$tmp->old."
";
   }
&＃63;>

<&＃63;php
   $xml = "";
   $f = fopen('person.xml', 'r');
   while( $data = fread( $f, 4096 ) ) {
     $xml .= $data;
   }
   fclose( $f );
   // 上面读取数据
   preg_match_all( "/\&;humans\&;(.*&＃63;)\&;\/humans\&;/s", $xml, $humans ); //匹配最外层标签里面的内容
   foreach( $humans[1] as $k=>$human )
   {
     preg_match_all( "/\&;name\&;(.*&＃63;)\&;\/name\&;/", $human, $name ); //匹配出名字
     preg_match_all( "/\&;sex\&;(.*&＃63;)\&;\/sex\&;/", $human, $sex ); //匹配出性别
     preg_match_all( "/\&;old\&;(.*&＃63;)\&;\/old\&;/", $human, $old ); //匹配出年龄
   }
   foreach($name[1] as $key=>$val){
     echo $val." - ".$sex[$key][1]." - ".$old[$key][1]."
" ;
   }
&＃63;>

<&＃63;php
   $reader = new XMLReader();
   $reader->open('person.xml'); //读取xml数据
   $i=1;
   while ($reader->read()) { //是否读取
     if ($reader->nodeType == XMLReader::TEXT) { //判断node类型
       if($i%3) {
         echo $reader->value; //取得node的值
       } else {
         echo $reader->value."
" ;
       }
       $i++;
     }
   }
&＃63;>