
登录页面:0127lianxi.php
<body> <h1>登陆</h1> <form action="0127lianxi.php" method="post"> <div> <span>用户名:</span><input type="text" name="uid" /></div> <div> <span>密 码:</span><input type="text" name="pwd" /></div> <div><input type="submit" name="btn" value="登录" /></div> </form> </body>

登陆处理页面:0127mydbda.php
<?php//有局限性,比较复杂的方法class mydbda
{ var $host="localhost"; var $username="root"; var $password="123"; var $database="mydb";function denglu($uid,$pwd)
{ $db=new mysqli($this->host,$this->username,$this->password,$this->database); if(mysqli_connect_error())
{ echo "连接失败"; exit;
} else
{ $sql="select * from login where UserName='{$uid}' and Password='{$pwd}'" ; $result=$db->query($sql); if($row=$result->fetch_row())
{ return "ok";
} else
{ return "no";
}
}
}
}?>主页面相比之下的改变:0127lianxi.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<h1>主页面</h1>
<div>
<?phpinclude("0127mydbda.php");$uid=$_POST["uid"];$pwd=$_POST["pwd"];$dl = new mydbda();if($dl->denglu($uid,$pwd)=="ok")
{
}else{ header("Location:0127denglu.php");
}//1.连接数据可以$db = new mysqli("localhost","root","123","mydb");//2.判断是否连接成功if(mysqli_connect_error())
{ echo "连接失败";
}else{ //3.写sql语句
$sql = "select * from info "; //4.执行sql语句
$result=$db->query($sql); //5.处理数据,遍历数据
echo "<table width=90% cellpadding=0 cellspacing=0 border=1>"; echo "<tr> <td>代号</td> <td>姓名</td> <td>性别</td> <td>民族</td> <td>生日</td> <td>操作</td> </tr>"; while($row=$result->fetch_row())
{ //改性别
$sex=$row[2]?"男":"女";
//改民族
$nation=NationName($db,$row[3]); //改生日
$birthday=date("Y年m月d日",strtotime($row[4]));
echo "<tr bgcolor='#00FFCC'> <td>{$row[0]}</td> <td>{$row[1]}</td> <td>{$sex}</td> <td>{$nation}</td> <td>{$birthday}</td> <td><a href='0127sc.php?code=".$row[0]."' onclick="return confirm('确定删除吗?')">删除</a> <a href='0127xiugai.php?code=".$row[0]."'>修改</a></td> </tr>";//" "双引号里出现双引号转义字符用
}
echo "</table>";
}function NationName($db,$code)
{ //写sql语句
$sql="select * from nation where code='{$code}'"; //4.执行sql语句
$result=$db->query($sql); //5.处理数据
if($row=$result->fetch_row())
{ return $row[1];
} else
{ return "";
}
}?>
</div>
<div><a href="0127tianjia.php">添加数据</a></div><form>
<input type="submit" value="提交" onclick="return confirm('确定么')" />
</form></body>
</html>
登陆处理页面优化1:0127dlchuli.php
<!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>
<?phpclass mydbda
{ var $host="localhost"; var $username="root"; var $password="123"; var $database="mydb";
/*
功能:执行SQL语句,返回结果
参数:$sql:要执行的SQL语句
$type:SQL语句的类型,CX代表查询,QT代表其他
$data:要操作的数据库
返回值:如果是查询,返回结果集
如果是其他语句,执行成功返回ok,失败返回no */
function select($sql,$type,$data)
{
$db=new mysqli($this->host,$this->username,$this->password,$data); if(mysqli_connect_error())
{ echo "连接失败"; exit;
} else
{ $result=$db->query($sql); if($type=="CX")
{ return $result;
} else
{ if($result)
{ return "ok";
}
else
{ return "no";
}
}
}
}
/*function denglu($uid,$pwd)
{
$db=new mysqli($this->host,$this->username,$this->password,$this->database);
if(mysqli_connect_error())
{
echo "连接失败";
exit;
}
else
{
$sql="select * from login where UserName='{$uid}' and Password='{$pwd}'" ;
$result=$db->query($sql);
if($row=$result->fetch_row())
{
return "ok";
}
else
{
return "no";
}
}
}*/
}?>
</body>
</html>相应的主页面的改变
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<h1>主页面</h1>
<div>
<?phpinclude("0127mydbda.php");$uid=$_POST["uid"];$pwd=$_POST["pwd"];$dl = new mydbda();$sqldl = "select * from login where UserName='{$uid}' and Password='{$pwd}'";
$jieguo = $dl->select($sqldl,"CX","mydb");
if($rowdl=$jieguo->fetch_row())//与后面的return $result对应
{
}
else
{
header("Location:0127denglu.php");
}/*if($dl->denglu($uid,$pwd)=="ok")//通过上面方法优化
{
}
else
{
header("Location:0127denglu.php");
}*///1.连接数据可以$db = new mysqli("localhost","root","123","mydb");//2.判断是否连接成功if(mysqli_connect_error())
{ echo "连接失败";
}else{ //3.写sql语句
$sql = "select * from info "; //4.执行sql语句
$result=$db->query($sql); //5.处理数据,遍历数据
echo "<table width=90% cellpadding=0 cellspacing=0 border=1>"; echo "<tr> <td>代号</td> <td>姓名</td> <td>性别</td> <td>民族</td> <td>生日</td> <td>操作</td> </tr>"; while($row=$result->fetch_row())
{ //改性别
$sex=$row[2]?"男":"女";
//改民族
$nation=NationName($db,$row[3]); //改生日
$birthday=date("Y年m月d日",strtotime($row[4]));
echo "<tr bgcolor='#00FFCC'> <td>{$row[0]}</td> <td>{$row[1]}</td> <td>{$sex}</td> <td>{$nation}</td> <td>{$birthday}</td> <td><a href='0127sc.php?code=".$row[0]."' onclick="return confirm('确定删除吗?')">删除</a> <a href='0127xiugai.php?code=".$row[0]."'>修改</a></td> </tr>";//" "双引号里出现双引号转义字符用
} echo "</table>";
}function NationName($db,$code)
{ //写sql语句
$sql="select * from nation where code='{$code}'"; //4.执行sql语句
$result=$db->query($sql); //5.处理数据
if($row=$result->fetch_row())
{ return $row[1];
} else
{ return "";
}
}?>
</div>
<div><a href="0127tianjia.php">添加数据</a></div>
<form>
<input type="submit" value="提交" onclick="return confirm('确定么')" />
</form>
</body>
</html>登陆处理页面优化2:0127dlchuli.php——拼接字符串
<!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>
<?phpclass mydbda
{ var $host="localhost"; var $username="root"; var $password="123"; var $database="mydb";
/*
功能:执行SQL语句,返回结果
参数:$sql:要执行的SQL语句
$type:SQL语句的类型,CX代表查询,QT代表其他
$data:要操作的数据库
返回值:如果是查询,返回结果集
如果是其他语句,执行成功返回ok,失败返回no */
function select($sql,$type,$data)
{
$db=new mysqli($this->host,$this->username,$this->password,$data); if(mysqli_connect_error())
{ echo "连接失败"; exit;
} else
{ $result=$db->query($sql); if($type=="CX")
{ //return $result; 用拼接字符串替换掉
$str="";
while($row=$result->fetch_row())
{
for($i=0;$i<count($row);$i++)
{
$str=$str.$row[$i]."^";
}
$str=substr($str,0,strlen($str)-1);//去掉"|"前面的"^"
$str = $str."|";
//n001^汉族^|n002^回族^|n003^苗族^|
}
$str=substr($str,0,strlen($str)-1);//去掉"|"
return $str;
} else
{ if($result)
{ return "ok";
}
else
{ return "no";
}
}
}
}
/*function denglu($uid,$pwd)
{
$db=new mysqli($this->host,$this->username,$this->password,$this->database);
if(mysqli_connect_error())
{
echo "连接失败";
exit;
}
else
{
$sql="select * from login where UserName='{$uid}' and Password='{$pwd}'" ;
$result=$db->query($sql);
if($row=$result->fetch_row())
{
return "ok";
}
else
{
return "no";
}
}
}*/
}?>
</body>
</html>相应的主页面的改变
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<h1>主页面</h1>
<div>
<?phpinclude("0127mydbda.php");$uid=$_POST["uid"];$pwd=$_POST["pwd"];$dl = new mydbda();$sqldl = "select * from login where UserName='{$uid}' and Password='{$pwd}'";
$jieguo = $dl->select($sqldl,"CX","mydb");
if($jieguo=="")
{
header("Location:0127denglu.php");
}
else
{
}
/*if($rowdl=$jieguo->fetch_row())//与后面的return $result对应
{
}
else
{
header("Location:0127denglu.php");
}*//*if($dl->denglu($uid,$pwd)=="ok")//通过上面方法优化
{
}
else
{
header("Location:0127denglu.php");
}*///1.连接数据可以$db = new mysqli("localhost","root","123","mydb");//2.判断是否连接成功if(mysqli_connect_error())
{ echo "连接失败";
}else{ //3.写sql语句
$sql = "select * from info "; //4.执行sql语句
$result=$db->query($sql); //5.处理数据,遍历数据
echo "<table width=90% cellpadding=0 cellspacing=0 border=1>"; echo "<tr> <td>代号</td> <td>姓名</td> <td>性别</td> <td>民族</td> <td>生日</td> <td>操作</td> </tr>"; while($row=$result->fetch_row())
{ //改性别
$sex=$row[2]?"男":"女";
//改民族
$nation=NationName($db,$row[3]); //改生日
$birthday=date("Y年m月d日",strtotime($row[4]));
echo "<tr bgcolor='#00FFCC'> <td>{$row[0]}</td> <td>{$row[1]}</td> <td>{$sex}</td> <td>{$nation}</td> <td>{$birthday}</td> <td><a href='0127sc.php?code=".$row[0]."' onclick="return confirm('确定删除吗?')">删除</a> <a href='0127xiugai.php?code=".$row[0]."'>修改</a></td> </tr>";//" "双引号里出现双引号转义字符用
} echo "</table>";
}function NationName($db,$code)
{ //写sql语句
$sql="select * from nation where code='{$code}'"; //4.执行sql语句
$result=$db->query($sql); //5.处理数据
if($row=$result->fetch_row())
{ return $row[1];
} else
{ return "";
}
}?>
</div>
<div><a href="0127tianjia.php">添加数据</a></div>
<form>
<input type="submit" value="提交" onclick="return confirm('确定么')" />
</form>
</body>
</html>
其他页面不变
添加页面:
<!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>
<h1>添加页面</h1>
<form action="0127tjchuli.php" method="post">
<div><span>代号:</span><input type="text" name="code" /></div>
<div><span>姓名:</span><input type="text" name="name" /></div>
<div><span>性别:</span><input type="radio" checked="checked" name="sex" value="true"/>男<input type="radio" name="sex" value="false"/>女</div>
<div>
<span>民族:</span>
<select name="nation">
<?php $db=new mysqli("localhost","root","123","mydb"); if(mysqli_connect_error())
{ echo "连接错误";
} else
{ $sql="select * from nation"; $result=$db->query($sql); while($row=$result->fetch_row())
{ echo"<option value='{$row[0]}'>{$row[1]}</option>";
}
}
?>
</select>
</div>
<div><span>生日:</span><input type="text" name="birthday"/></div>
<div><input type="submit" value="添加" /> <a href="0127lianxi.php">返回</a></div>
</form>
</body>
</html>添加处理页面:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<?php$code=$_POST["code"];$name=$_POST["name"];$sex=$_POST["sex"];$nation=$_POST["nation"];$birthday=$_POST["birthday"];
$db=new mysqli("localhost","root","123","mydb"); if(mysqli_connect_error())
{ echo "连接错误";
}else{ $sql="insert into Info values('{$code}','{$name}','{$sex}','{$nation}','{$birthday}')"; $result=$db->query($sql); if($result)
{ header("Location:0127tianjia.php");
} else
{ echo "添加失败";
}
}?>
</body>
</html>
删除页面:
<!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>
<?php$code=$_GET["code"];$db=new mysqli("localhost","root","123","mydb");if(mysqli_connect_error())
{ echo "连接错误";
} else
{ $sql="delete from Info Where code='{$code}'"; $result=$db->query($sql); if($result)
{ header("Location:0127lianxi.php");
} else
{ echo "删除失败";
}
}?>
</body>
</html>修改页面:
<!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>
<h1>修改页面</h1>
<?php$code=$_GET["code"];$db=new mysqli("localhost","root","123","mydb");if(mysqli_connect_error())
{ echo "连接错误";
}else{ $sql="select * from Info where code='".$code."'"; $result=$db->query($sql); $row=$result->fetch_row();
}?>
<form action="0127xgchuli.php" method="post">
<div><span>代号:</span><input type="text" name="code" value="<?php echo $row[0] ?>" readonly="readonly"/></div>
<div><span>姓名:</span><input type="text" name="name" value="<?php echo $row[1] ?>" /></div>
<div><span>性别:</span><input type="radio" <?php echo (bool)$row[2]?"checked='checked'":"" ?> name="sex" value="true"/>男<input type="radio" name="sex" value="false" <?php echo !(bool)$row[2]?"checked='checked'":"" ?>/>女</div>
<div>
<span>民族:</span>
<select name="nation">
<?php $db=new mysqli("localhost","root","123","mydb"); if(mysqli_connect_error())
{ echo "连接错误";
} else
{ $sql="select * from nation"; $result=$db->query($sql); while($rownation=$result->fetch_row())
{ if($rownation[0]==$row[3])
{ echo "<option selected='selected' value='{$rownation[0]}' >{$rownation[1]}</option>";
} else
{ echo "<option value='{$rownation[0]}'>{$rownation[1]}</option>";
}
}
}
?>
</select>
</div>
<div><span>生日:</span><input type="text" name="birthday" value="<?php echo $row[4] ?>"/></div>
<div><input type="submit" value="修改" /> <a href="0127lianxi.php">返回</a></div>
</form>
</body>
</html>修改处理页面:0127xgchuli.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<?php$code=$_POST["code"];$name=$_POST["name"];$sex=$_POST["sex"];$nation=$_POST["nation"];$birthday=$_POST["birthday"];//1.造连接对象$db=new mysqli("localhost","root","123","mydb");//2.判断是否连接成功if(mysqli_connect_error())
{ echo "连接失败";
} else
{ //3.写语句
$sql="update info set name='".$name."',sex='".$sex."',nation='".$nation."',birthday='".$birthday."'where code='".$code."'"; //4.执行sql语句
$result = $db->query($sql); //判断是否修改成功
if($result)
{ header("Location:0127lianxi.php");
} else
{ echo "修改失败!";
}
}?>
</body>
</html>查询数据在主页面处理:
<!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>
<h1>主页面</h1><form action="0127lianxi.php" method="post">
<div style="width:100%; height:40px">
<span>代号:</span>
<input type="text" name="code"/> <span>姓名:</span>
<input type="text" name="name"/> <input type="submit" value="查询" name="btn"/>
</div>
</form><div>
<?php//登录代码/*include("0127mydbda.php");
$uid=$_POST["uid"];
$pwd=$_POST["pwd"];
$dl = new mydbda();
$sqldl = "select * from login where UserName='{$uid}' and Password='{$pwd}'";
$jieguo = $dl->select($sqldl,"CX","mydb");
if($jieguo=="")
{
header("Location:0127denglu.php");
}
else
{
}*//*if($rowdl=$jieguo->fetch_row())//与后面的return $result对应
{
}
else
{
header("Location:0127denglu.php");
}*//*if($dl->denglu($uid,$pwd)=="ok")//通过上面方法优化
{
}
else
{
header("Location:0127denglu.php");
}*/
//查询代码
$strsel = "";
if(@$_POST["code"] != null)
{
$strsel = " where Code = '".$_POST["code"]."'"; //where前面必须要有空格
if(@$_POST["name"]!= null)
{
$strsel = " where Code='".$_POST["code"]."' and Name like '%".$_POST["name"]."%'";//where前面必须有空格
}
//else {$strsel = " where Code = '".$_POST["code"]."'";}可以省略
}
else
{
if(@$_POST["name"]!= null)
{
$strsel = " where Name like '%".$_POST["name"]."%'";//where前面必须有空格
}
//else{$strsel="";}都为空执行最开始的$strsel
} //1.连接数据可以$db = new mysqli("localhost","root","123","mydb");//2.判断是否连接成功if(mysqli_connect_error())
{ echo "连接失败";
}else{ //3.写sql语句
$sql = "select * from Info".$strsel; //4.执行sql语句
$result=$db->query($sql); //5.处理数据,遍历数据
echo "<table width=90% cellpadding=0 cellspacing=0 border=1>"; echo "<tr> <td>代号</td> <td>姓名</td> <td>性别</td> <td>民族</td> <td>生日</td> <td>操作</td> </tr>"; while($row=$result->fetch_row())
{ //改性别
$sex=$row[2]?"男":"女";
//改民族
$nation=NationName($db,$row[3]); //改生日
$birthday=date("Y年m月d日",strtotime($row[4]));
echo "<tr bgcolor='#00FFCC'> <td>{$row[0]}</td> <td>{$row[1]}</td> <td>{$sex}</td> <td>{$nation}</td> <td>{$birthday}</td> <td><a href='0127sc.php?code=".$row[0]."' onclick="return confirm('确定删除吗?')">删除</a> <a href='0127xiugai.php?code=".$row[0]."'>修改</a></td> </tr>";//" "双引号里出现双引号转义字符用
} echo "</table>";
}function NationName($db,$code)
{ //写sql语句
$sql="select * from nation where code='{$code}'"; //4.执行sql语句
$result=$db->query($sql); //5.处理数据
if($row=$result->fetch_row())
{ return $row[1];
} else
{ return "";
}
}?>
</div>
<div><a href="0127tianjia.php">添加数据</a></div>
<form>
<input type="submit" value="提交" onclick="return confirm('确定么')" />
</form>
</body>
</html>
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