<?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＼>(.*?)＼<＼/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＼>(.*?)＼<＼/name＼>/", $human, $name ); //匹配出名字    preg_match_all( "/＼<sex＼>(.*?)＼<＼/sex＼>/", $human, $sex ); //匹配出性别    preg_match_all( "/＼<old＼>(.*?)＼<＼/old＼>/", $human, $old ); //匹配出年龄}foreach($name[1] as $key=>$val){    echo $val." - ".$sex[$key][1]." - ".$old[$key][1]."<br>" ;}?>

<?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."<br>" ;        }        $i++;    }}?>