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登录界面的代码：
< html xmlns="http://www.w3.org/1999/xhtml"> < head > < meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> < title >无标题文档</ title > </ head > < body > < form action="chuli.php" method="post"> < div >用户名：< input type="text" name="uid" /></ div > < div >密码：< input type="password" name="pwd" /></ div > < div >< input type="submit" value="登录" /></ div > </ form > </ body > </ html > |
| 处理页面的php代码： <?php $uid = $_POST["uid"];$pwd = $_POST["pwd"];//造连接对象 $db = new MySQLi("localhost","root","123","mydb");//写SQL语句 $sql = "select password from login where username='{$uid}'"; //执行SQL语句$reslut = $db->query($sql);$n = $reslut->fetch_row(); if($uid!="" && $pwd !="" ) { if($n[0]==$pwd) { header("location:main.php"); } else { echo "用户名或密码错误！"; }}else{ echo "用户名密码不能为空";} |
| 登陆后跳转到的main界面： <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body> <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> <td>操作</td> </tr> <?php //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); //写SQL语句 $sql = "select * from info"; //执行SQL语句 $result = $db->query($sql); //读数据 $attr = $result->fetch_all(); foreach($attr as $v) { $sex = $v[2]?"男":"女"; //根据名族代号查询名族名称 $name = NationName($v[3]); echo "<tr><td>{$v[0]}</td><td>{$v[1]}</td><td>{$sex}</td><td>{$name}</td><td>{$v[4]}</td></tr>"; } //给一个民族代号，返回民族名称 function NationName($code) { //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); //写SQL语句 $sql = "select name from nation where code='{$code}'"; //执行SQL语句 $result = $db->query($sql); $attr = $result->fetch_row(); return $attr[0]; } ?></table></body></html> |