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：

<?php $con=@mysql_connect('localhost','root','root');//连接数据库 mysql_select_db('test',$con);//选择数据库 $userInfo=mysql_query("select * from user",$con);//创建sql语句 echo "<table>"; while($row=mysql_fetch_assoc($userInfo))//获取结果集每一行的数据 { echo "<tr>"; echo "<td>"; echo $row['id'];//获取行中的id echo "</td>"; echo "<td>"; echo $row['username']; echo "</td>"; echo "<td>"; echo $row['password']; echo "</td>"; echo "</tr>"; } echo "</table>"; mysql_free_result($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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