php示例代码之使用MySQLi接口

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<?php   //连接参数   $host="localhost";   $user="root";   $pwd="111111";   $db="test";       $linkID =mysqli_connect($host,$user,$pwd,$db); //创建一个mysql连接       if(!$linkID){     echo "<font color='red'>unable to connect!</font>";   }       $SQL_SELECT_SYMBOLS="select * from symbols";       $result=mysqli_query($linkID,$SQL_SELECT_SYMBOLS)or die("error in query :$query. ".mysql_errno()); //执行SQL语句       if(mysqli_num_rows($result)>0){     echo '<table cellpadding="10" border="1">';     echo '<tr><th>id</th><th>country</th><th>animal</th><th>cname</th></tr>';      while($row=mysqli_fetch_row($result)){         echo "<tr>";         echo "<td>".$row[0]."</td>";         echo "<td>".$row[1]."</td>";         echo "<td>".$row[2]."</td>";         echo "<td>".$row[3]."</td>";         echo "</tr>";      }      echo "</table>";   }   else{     echo "记录未找到!";   }       mysqli_free_result($result); //释放记录集所占用的内存       mysqli_close($linkID); //关闭数据库连接 ?>