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：

<?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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