php抓取这个网页的数据，只要数据，不用html内容，然后json后写入文件，新手求教

$url = 'http://www.okooo.com/Upload/sohu/table_23.html';<br />$s = file_get_contents($url);<br />preg_match_all('#<table.+</table>#isU', $s, $m);<br />foreach(array_map('strip_tags', $m[0]) as $r) {<br />  $a = preg_split('/\s+/', $r, -1, PREG_SPLIT_NO_EMPTY);<br />  $res[] = array_chunk(array_slice($a, 0, -1), 3);<br />}<br />print_r($res);<br />echo json_encode($res);

Array<br>(<br>    [0] => Array<br>        (<br>            [0] => Array<br>                (<br>                    [0] => 排名<br>                    [1] => 球队<br>                    [2] => 积分<br>                )<br><br>            [1] => Array<br>                (<br>                    [0] => 1<br>                    [1] => 尤文图斯<br>                    [2] => 102<br>                )<br><br>            [2] => Array<br>                (<br>                    [0] => 2<br>                    [1] => 罗马<br>                    [2] => 85<br>                )<br><br>            [3] => Array<br>                (<br>                    [0] => 3<br>                    [1] => 那不勒斯<br>                    [2] => 78<br>                )<br><br>            [4] => Array<br>                (<br>                    [0] => 4<br>                    [1] => 佛罗伦萨<br>                    [2] => 65<br>                )<br><br>            [5] => Array<br>                (<br>                    [0] => 5<br>                    [1] => 国际米兰<br>                    [2] => 60<br>                )<br><br>            [6] => Array<br>                (<br>                    [0] => 6<br>                    [1] => 帕尔马<br>                    [2] => 58<div class="clear">
                 
              
              
        
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