1.查询：
数据的显示，这里就可以嵌入php来进行数据的输出
<!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>名称</td><td>性别</td><td>生日</td><td>班级</td><td>操作</td></tr><?php$db = new MySQLi("localhost","root","12345678","heiheihei");//连接数据库$sql = "select * from student ";//写sql语句$r = $db->query($sql);//执行sql语句返回给rif($r)//条件{while ($attr = $r->fetch_row()){$ssex = "";if($attr[2]){$ssex = "男";}else{$ssex = "女";}echo"<tr><td>{$attr[0]}</td><td>{$attr[1]}</td><td>{$ssex}</td><td>{$attr[3]}</td><td>{$attr[4]}</td>//添加一个单击事件，防止不小心删掉<td><a οnclick=\"return confirm('确定要删除吗？？？')"href='shanchu.php?sno={$attr[0]}'>删除</a><a href='xiugai.php?sno={$attr[0]}'>修改</a> </td> </tr>"; } } ?></table><a href="tianjia.php" rel="external nofollow" >添加页面</a></body></html>
2.删除的处理页面
删除时是链接到删除处理页面的，所以还要写一个删除处理页面：
<?php$aaa = $_GET ["sno"]; //删除方式使用的get，照旧$db = new mysqli("localhost","root","12345678","heiheihei");//连接...$sql = "delete from student WHERE sno='{$aaa}'";//写sql语句，sno主键if($db->query($sql)) //执行sql语句{ header("location:text.php");//删完回去表页面}else{ echo "删除失败";}?>
来张效果图：
3.添加数据：
点击即可进入添加页面
添加页面：
<body><h1>添加</h1><form action="add.php" method="post" ><div>代号:<input type="text" name="sno"/></div><div>名字:<input type="text" name="sname"/></div><div>性别: <input type="radio" value="1" name="sex" />男<input type="radio" value="0" name="sex"/>女</div><div>日期:<input type="text" name="sbirthday"/></div>//创建表时性别是用的1或2来表示的，要是进行修改不知道1或2代表了什么，所以就要进行处理，处理成用户能够明白的男和女<div>班级:<select name="class"><?php $db= new MYSQLi("localhost","root","12345678","heiheihei");//连接... $sql = " select * from class ";//写sql... $r = $db->query($sql);//执行...返回...while($arr = $r->fetch_row()){echo "<option value='{$arr[0]}'>{$arr[1]}</option>";//添上以后回表页面}?></select></div><div><input type="submit" value="添加"/></div></form></body>
添加也需要一个处理页面来判断添加：
<?php$sno = $_POST["sno"];//$_POST 变量用于收集来自 method="post" 的表单中的值。$sname = $_POST["sname"];$ssex = $_POST["ssex"];$sbirthday = $_POST["sbirthday"];$class = $_POST["class"];$db = new mysqli("localhost","root","12345678","heiheihei");$sql = "insert into student VALUES ('{$sno}','{$sname}','{$ssex}','{$sbirthday}','{$class}')";//向数据库中添加写的数据 if($db->query($sql)){ header("location:text.php"); //header() 函数向客户端发送原始的 HTTP 报头。}else { echo "添加失败";}?>
效果图：
4.修改数据：主键不可修改！！
<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><h1>修改</h1><?php$sno = $_GET{"sno"};$db = new mysqli("localhost","root","12345678","heiheihei");$sql = "select * from student WHERE sno='{$sno}'";$r = $db->query($sql);$arr = $r->fetch_row();?> <form action="update.php" method="post"> <div>代号：<input readonly="readonly" type="text" name="sno" value="<?phpecho $arr[0];?>"/></div>//readonly只可读 <div>名称：<input type="text" name="sname" value="<?php echo $arr[1]; ?>"/></div> <div>性别： <input type="radio" name="ssex" value="1" <?php echo $arr[2]?"checked='checked'":""; ?>/>男 <!-- 三元运算符，如果性别=ture，默认值就在男上面，否则空--> <input type="radio" name="ssex" value="0" <?php echo $arr[2]?"":"checked='checked'"; ?>/>女 </div> <div>日期：<input type="text" name="sbirthday" value="<?php echo $arr[3]; ?>"/></div> <div>班级：<select name="class">//value取默认值 <?php $sclass = "select * from class"; $rclass = $db->query($sclass); while($attr = $rclass->fetch_row()) //取到的班级信息 { //判断将要输出的班级是不是和该人员的是否相同 if($arr[4]==$attr[0])//arr是班级名，attr是班级的代号，俩表 { echo "<option value = '{$attr[0]}' selected='selected'>{$attr[1]}</option>"; } else{ echo "<option value = '{$attr[0]}'>{$attr[1]}</option>"; } } ?> </select></div> <div><input type="submit" value="修改完毕"/></div></form></body></html>
修改的处理页面：
<?php$sno = $_POST["sno"];$sname = $_POST["sname"];$ssex = $_POST["ssex"];$sbirthday = $_POST["sbirthday"];$class = $_POST["class"];$db = new mysqli("localhost","root","12345678","heiheihei");$sql = "update student set sname='{$sname}',ssex='{$ssex}',sbirthday='{$sbirthday}',class='{$class}' WHERE sno='{$sno}'";//看一下是不是传递过来的sno值；if($db->query($sql)){ header("location:text.php");}else{ echo "修改失败";}?>
修改的效果图：