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php 连接mysql

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                    $link=@mysql_pconnect('127.0.0.1','root','');
            mysql_select_db('mysql',$link);
            $query="SELECT Host,User FROM user";
            $result=mysql_query($query,$link);
            //获取的字段
            while($filed=mysql_fetch_field($result)){
                echo $filed->name."
";            

            }
            echo mysql_affected_rows($link);
            //获取行
            while($row=mysql_fetch_row($result)){
                echo $row[0].$row[1].'
';
            }

            //$query="CREATE DATABASE my_db";
            /*$sql = "CREATE TABLE Persons (
                FirstName varchar(15),
                LastName varchar(15),
                Age int
            )";*/
            /*$sql = "CREATE TABLE Persons (personID int NOT NULL AUTO_INCREMENT,
        PRIMARY KEY(personID),
        FirstName varchar(15),
        LastName varchar(15),
        Age int
        )";  设置主键
            */

        /*mysql_query("INSERT INTO Persons (FirstName, LastName, Age)
VALUES ('Peter', 'Griffin', '35')");*/

        /*$result = mysql_query("SELECT * FROM Persons");

while($row = mysql_fetch_array($result))
  {
  echo $row['FirstName'] . " " . $row['LastName'];
  echo "
";
  }

        */
  /*查找
    $result = mysql_query("SELECT * FROM Persons
WHERE FirstName='Peter'");

while($row = mysql_fetch_array($result))
  {
  echo $row['FirstName'] . " " . $row['LastName'];
  echo "
";
  }

  */
            mysql_close($link);
                ?>
   
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