connect($memcachehost,$memcacheport) or die ("Could not connect"); $query="select * from personal_info limit 10"; $key=md5($query); if(!$memcache->get($key)) {                 $conn=mysql_connect("localhost","root","passwd");                 mysql_select_db(mydb);                 $result=mysql_query($query);                 while ($row=mysql_fetch_assoc($result))                 {                         $arr[]=$row;                 }                 $f = 'mysql';                 $memcache->add($key,serialize($arr),0,30);        //mysql 查询后，插入 memcached                 $data = $arr ; } else{         $f = 'memcache';         $data_mem=$memcache->get($key);         $data = unserialize($data_mem); } echo $f; echo "
"; //print_r($data); foreach($data as $a) {                 echo "number is $a[pi_id]";                 echo "
";                 echo "name is $a[pi_name]";                 echo "
";                 echo "tel is $a[pi_tel]";                 echo "
";                 echo "qq is $a[pi_qq]";                 echo "
";                 echo "email is $a[pi_email]";                 echo "
";  } ?>