mysql php 增删改查_PHP MySql增删改查的简单实例

mysql_connect()连接数据库

mysql_select_db选择数据库

mysql_fetch_assoc()获取结果集

mysql_query()执行sql语句

实例如下：

$con=@mysql_connect("localhost","root","root");//连接数据库

mysql_select_db("test",$con);//选择数据库

$userInfo=mysql_query("select * from user",$con);//创建sql语句

echo "

while($row=mysql_fetch_assoc($userInfo))//获取结果集每一行的数据

{

echo "

";

echo "

";

echo $row["id"];//获取行中的id

echo "

";

echo "

";

echo $row["username"];

echo "

";

echo "

";

echo $row["password"];

echo "

";

echo "

";

}

echo "

";

mysql_free_result($userInfo);//释放结果集

mysql_close($con); //关闭数据库

/*delete

$d=@mysql_connect("localhost","root","root");

mysql_select_db("test",$d);

mysql_query("delete from user where id=1",$d);

mysql_close($d);

*/

/*insert

$i=@mysql_connect("localhost","root","root");

mysql_select_db("test",$i);

mysql_query("insert into user(username,password) values("ad","ad")",$i);

mysql_close($i);

*/

//update

$u=@mysql_connect("localhost","root","root");

mysql_select_db("test",$u);

mysql_query("update user set username="aaa" where username="00"",$u);

echo "update user set username="ax" where id=2";

mysql_close($u);

?>

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