PHP连接MySQL进行增、删、改、查操作

<table width="100%" border="1" cellpadding="0" cellspacing="0"><tr><td>代号</td><td>姓名</td><td>性别</td><td>民族</td><td>生日</td></tr><?php1.造一个mysqli对象,造连接对象$db = new MySQLi("localhost","用户名","密码","数据库名");2.准备一条SQL语句$sql = "select * from info";3.执行SQL语句,如果是查询语句，成功返回结果集对象$reslut = $db->query($sql);4.判断返回是否执行成功if($reslut){while($attr = $reslut->fetch_row()){echo "<tr><td>{$attr[0]}</td><td>{$attr[1]}</td><td>{$attr[2]}</td><td>{$attr[3]}</td><td>{$attr[4]}</td></tr>";}}?></table>

<?php//造连接对象$db = new MySQLi("localhost","用户名","密码","数据库名");//准备SQL语句$sql = "delete from info where code='p004'";       删//$sql = "insert course values"             增//$sql = "update 表名 set 字段=信息 where 字段=信息"     改//执行SQL语句$r = $db->query($sql);if($r){echo "执行成功";}else{echo "执行失败";}?>