BÀI TẬP HƯỚNG DẪN GIẢI SQL TRONG LẬP TRÌNH WEB
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Jacky + Cupid+Kit
Thông tin khách hàng ( Sửa, Xóa)
/ Connect /
<?php
$db = mysql_connect("localhost","root","");
if(!$db)
{
echo "Loi SQL";
exit();
}
$db = mysql_select_db("ql_ban_hang");
if(!$db)
{
echo "Loi DB";
exit();
}
mysql_query("set names utf8");
?>
/ Main /
<html>
<body>
<script language="javascript">
function xac_nhan()
{
var xn = confirm("Bạn có muốn xóa hay không?");
if(xn == true)
return true;
else
return false;
}
</script>
<?php
include(“connect.php”);
$sql = "SELECT * FROM khach_hang";
$r1 = mysql_query($sql);
$n = mysql_fetch_assoc($r1);
$str= ' ';
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$str .='<tr>
<td>'.$n["Ma_khach_hang"].'</td>
<td>'.$n["Ten_khach_hang"].'</td>
…….
<td><a href="test_sua.php?ma='.$n["Ma_khach_hang"].'">Sua</a></td>
<td><a onclick="return xac_nhan();"
href="test_xoa.php?ma='.$n["Ma_khach_hang"].'">Xoa</a></td>
</tr>';
}
?>
<table align="center" border="1" cellpadding="0" cellspacing="0" width="800">
<tr>
<td>Ma khach hang</td>
<td>Ten khach hang</td>
…….
<td>Sua</td>
<td>Xoa</td>
</tr>
<?php
echo $str;
mysql_close();
?>
</table>
</body>
</html>
/ Sửa /
<body>
<?php
include(“connect.php”);
if(isset($_POST["bt_Sua"]))
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{
$ma_kh = $_POST["txt_ma"];
$ten_kh= $_POST["txt_ten"];
$phai = $_POST["rb_phai"];
$dia_chi= $_POST["txt_dc"];
$dien_thoai= $_POST["txt_dt"];
$email = $_POST["txt_email"];
$sql1= "UPDATE khach_hang
SET Ten_khach_hang ='{$ten_kh}', Phai = '{$phai}', Dia_chi ='{$dia_chi}',
Dien_thoai='{$dien_thoai}', Email='{$email}'
WHERE Ma_khach_hang = '{$ma_kh}' ";
$query1 = mysql_query($sql1);
echo '<meta http-equiv="refresh" content="1;url=test_2_12_thongtinkh.php"/>';
}
elseif(isset($_GET["ma"]))
{
$ma = $_GET["ma"];
$sql ="SELECT * FROM khach_hang WHERE Ma_khach_hang='$ma'";
$query = mysql_query($sql);
$n = mysql_fetch_assoc($query);
$ma_kh = $n["Ma_khach_hang"];
$ten_kh= $n["Ten_khach_hang"];
$phai = $n["Phai"];
$dia_chi= $n["Dia_chi"];
$dien_thoai= $n["Dien_thoai"];
$email = $n["Email"];
}
?>
<?php if(isset($_GET["ma"]) || isset($_POST["bt_Sua"])): ?>
<form id="form1" name="form1" action="" method="post">
<table align="center" border="1">
<tr>
<td align="center" colspan="2">Sua chi tiet</td>
</tr>
<tr>
<td>Ma khach hang</td>
<td><input type="text" id="txt_ma" name="txt_ma" readonly="readonly" value="<?php echo $ma_kh
?>"/></td>
</tr>
<tr>
<td>Ten khach hang</td>
<td><input name="txt_ten" type="text" id="txt_ten" value="<?php echo $ten_kh?>" /></td>
</tr>
<tr>
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<td>Phai</td>
<td><input type="radio" name="rb_phai" id="rb_phai_0" value="0" <?php if($phai==0) echo "checked"
?> />Nam<input type="radio" name="rb_phai" id="rb_phai_1" value="1" <?php if($phai==1) echo
"checked"; ?>/>Nu</td>
</tr>
………
<tr>
<td colspan="2" align="center">
<input type="submit" id="bt_Sua" name="bt_Sua" value="Sua"/>
</td>
</tr>
</table>
</form>
<?php endif; ?>
</body>
</html>
Xóa
<?php
Include(“connect.php”);
if(isset($_GET['ma']))
{
$ma_kh = $_GET['ma'];
$sql = "DELETE FROM khach_hang WHERE ma_khach_hang ='{$ma_kh}'";
$query1 = mysql_query($sql);
echo '<meta http-equiv="refresh" content="0;url=test_2_12_thongtinkh.php"/>';
}
?>
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Tìm kiếm theo combo list
Connect.php
<?php
$conn=mysql_connect('localhost','root','');
if(!$conn){
echo "loi";
exit;}
mysql_select_db('bookstore');
mysql_query("set names 'utf8'");
?>
/////////////////////////////////////////////////////
tk.php
<?php
include "connect.php";
$m=isset($_REQUEST['nhaxb'])?$_REQUEST['nhaxb']:"tatca";
$tu=isset($_REQUEST['tu'])?$_REQUEST['tu']:"";
$den=isset($_REQUEST['den'])?$_REQUEST['den']:"";?>
<body>
<?php
$query="select * from nhaxb";
$result=mysql_query($query,$conn);
?>
<form action="tk.php" method="get">
Nha xb <select name="nhaxb">
<option value="tatca"> </option>
<?php
while($row=mysql_fetch_array($result)){
$ma=$row[0];
$t=$row[1];
if ($ma==$m) $s=" selected "; else $s="";
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?>
<option value="<?php echo $ma;?>" <?php echo $s;?>><?php echo $t; ?></option>
<?php
}
?></select>
Gia tu: <input type="text" name="tu" value="<?php echo $tu;?>" />
Den: <input type="text" name="den" value="<?php echo $den;?>"/>
<input type="submit" name="tim" value="Tim" />
</form>
<table border="1">
<tr>
<td>
Ma sach
</td>
<td>
ten sach
</td>
<td>
Mo ta
</td>
</tr>
<?php
if(isset($_REQUEST['tim']))
{ $query="select * from sach where manxb = '$m'";
if($tu!='')
$query=$query." and gia >= ".$tu;
if($den!='')
$query=$query." and gia <= ".$den;
$result=mysql_query($query,$conn);
//$count=mysql_num_rows($result);
//$pagecount=ceil($);
while($row=mysql_fetch_array($result))
{
$masach=$row[0];
$tensach=$row[1];
$mota=$row[2];
echo "<tr><td>$masach</td><td>$tensach</td><td> $mota </td></tr>";
}
echo $m;
}
?>
</table>
</body>
</html>
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Tìm kiếm theo phân loai giá
<?php
Include “connect.php”;
$sql="SELECT * FROM sach ";
$result=mysql_query($sql);
?>
<body>
<form action="" method="post" name="form_timkiem">
Ten sach : <input type="text" name="ten"><br />
Gia tu <input type="text" name="gia_tu">
Gia den <input type="text" name="gia_den"><br />
<input type="submit" name="submit" value="Tim kiem">
</form>
<table border="1">
<?php
if(isset($_REQUEST['submit'])){
$ten=$_REQUEST['ten'];
$sql .="WHERE tensach like '%$ten%' ";
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if($_REQUEST['gia_tu']!="")
$sql.=" and gia >=".$_REQUEST['gia_tu'];
if($_REQUEST['gia_tu']!="")
$sql.=" and gia <=".$_REQUEST['gia_den'];
$res = mysql_query($sql);
while($row=mysql_fetch_array($res)){
?>
<tr>
<td><?php echo $row['tensach'];?></td>
<td><?php echo "<a href='chitiet.php?masach=".$row['masach']."'/><img
src='image_data/".$row['hinh']."'></a>"?></td>
<td><?php echo $row['gia'];?></td>
</tr>
<?php
}
echo $sql;
}
?>
</table>
</body>
</html>
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Chitiet.php
<body>
<?php
Include “connect.php”;
$ma=$_REQUEST["masach"];
$sql="SELECT tennxb,tenloai, sach . *
FROM sach
INNER JOIN nhaxb ON sach.manxb = nhaxb.manxb
INNER JOIN loai ON sach.maloai=loai.maloai
WHERE sach.masach = '$ma'";
$query = mysql_query($sql);
$tb = mysql_fetch_assoc($query);
$str ='<tr>
<td>
'.$tb["masach"].'
</td>
<td>
'.$tb["tensach"].'
</td>
<td><img src="image_data/'.$tb["hinh"].'" /></td>
<td>'.$tb["tennxb"].'</td>
<td>'.$tb["tenloai"].'</td>
<td>'.$tb["gia"].'</td>
</tr>';
?>
<table border="1">
<tr><td>Mã sách</td>
<td>Tên sách</td>
<td>hình</td>
<td>tên nhà xuất bản</td>
<td>tên loại sách</td>
<td>Giá</td>
</tr>
<?php
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echo $str;
?>
</table>
</body>
</html>
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Tìm kiếm thong tin (có phân trang) Làm theo hướng đối tượng
//////////////////////////
db.inc
<?php
$hostname='localhost';
$dbname='ql_ban_hang';
$dbuser='root';
$dbpass='';
?>
//////////////////////////
database.php
<?php
class database
{
var $sql="";
var $connection="";
var $cursor=null;
function database()
{
include('db.inc');
$this->connection =@mysql_connect($hostname,$dbuser,$dbpass);
if(!$this->connection)
die("Trang web đang bảo trì, vui lòng quay lại sau(1.1)");
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if($dbname=="" || !mysql_select_db($dbname,$this->connection))
die("Trang web đang bảo trì, vui lòng quay lại sau(1.2)");
}
function SetQuery($sql) //Gán cau lenh sql cho thuoc tinh $sql
{
$this->sql=$sql;
}
function Query() //Gán dl cho thuoc tinh $cursor
{
mysql_query("set names utf8");
$this->cursor = mysql_query($this->sql,$this->connection);
return $this->cursor;
}
function LoadAllRow()
{
if(!($cur=$this->query()))
{
return null;
}
$array=array();
while($row=mysql_fetch_assoc($cur))
{
$array[]=$row;
}
mysql_free_result($cur);
return $array;
}
function LoadOneRow()
{
if(!($cur=$this->query()))
{
return null;
}
$row=mysql_fetch_assoc($cur);
mysql_free_result($cur);
return $row;
}
function disconnect()
{
mysql_close($this->connection);
}
}
?>
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//////////////////////////
Main.php
<?php
include("includes/database.php");
if(!empty($_GET['txt_ten']))
{
$ten_sua = $_GET['txt_ten'];
$db = new database();
$rows = 2; // moi trang se co 2 san pham
// Phan trang
$sql1 = "SELECT count(*) as tong
FROM sua s,hang_sua h
WHERE s.ma_hang_sua = h.ma_hang_sua AND ten_sua like'%".$ten_sua."%'";
$db->SetQuery($sql1);
$row = $db->LoadOneRow();
//print_r($row);
$tong = $row['tong'];
$pages = ceil($tong/$rows);
$pageslist ='';
for($i = 1 ; $i <= $pages ; $i++)
{
$pagelist .='<a
href="bai2_9_pages.php?page='.$i.'&txt_ten='.$ten_sua.'">'.$i.'</a> ';
}
//============= xu ly tham so start =========
if(!isset($_GET['page']))
$start = 0;
else
$start = ($_GET['page'] - 1) * $rows;
//
if($tong > 0 )
{
$thong_bao ="Có $tong sản phẩm được tìm thấy";
}
else
$thong_bao ="Không tìm thấy sản phẩm nào";
//
$sql2 = "SELECT s.*,ten_hang_sua
FROM sua s,hang_sua h
WHERE s.ma_hang_sua = h.ma_hang_sua AND ten_sua
like'%".$ten_sua."%'
LIMIT $start,$rows";
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$db->SetQuery($sql2);
$table = $db->LoadAllRow();
//print_r($table);
$ket_qua='';
foreach($table as $row)
{
$ket_qua .='<table width="100%" border="1" align="center" style="border-collapse:collapse">
<tr>
<td colspan="2" style="text-align:center;background:#FFCCCC"><font size="+1"
color="#FF0000">'.$row['Ten_sua'].' - '.$row['ten_hang_sua'].'</font></td>
</tr>
<tr>
<td valign="top" width="150px"><img src="hinh_sua/'.$row['Hinh'].'" width="150px"/></td>
<td><strong>Thành phần dinh dưỡng:</strong><br />
'.$row['TP_Dinh_Duong'].' <br />
<strong>Lợi ích:</strong><br />
'.$row['Loi_ich'].' <br />
<strong>Trọng lượng:</strong><font color="#FF0000">'.$row['Trong_luong'].' gr</font> - <strong>Đơn
giá:</strong><font color="#FF0000">'. number_format($row['Don_gia']) .' VNĐ</font> </td>
</tr>
</table>';
}
}
?>
<form id="form1" name="form1" method="get" action="">
<table width="700" border="1" align="center" >
<tr>
<td ><div align="center" class="style1">TÌM KIẾM THÔNG TIN SỮA</div></td>
</tr>
<tr>
<td>Tên sữa:
<label>
<input type="text" name="txt_ten" id="txt_ten" value="<?php echo $ten_sua ?>" />
<input type="submit" name="bt_tim" id="bt_tim" value="Tìm kiếm" />
</label></td>
</tr>
<?php if(!empty($_GET['txt_ten'])): ?>
<tr bgcolor="#FFFFCC">
<td ><div align="center"><?php echo $thong_bao ?></div>
<table width="90%" align="center" border="2" style="border-color:#FF0000">
<tr>
<td><?php echo $ket_qua ?></td>
</tr>
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</table>
</td>
</tr>
<tr>
<td style="text-align:center"><?php echo $pagelist; ?></td>
</tr>
<?php endif; ?>
</table>
</form>
</body>
</html>
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Thông tin hiển thị dạng List (hướng đối tượng include database.php phía trên vào)
<body>
<?php
include("includes/database.php");
$db = new database();
$sql ="Select ma_sua, ten_sua,trong_luong,don_gia,hinh from sua";
$db->SetQuery($sql);
$table = $db->LoadAllRow();
$n = count($table);
$dem =0;
$cot = 5;
$str ='';
for($i = 0 ;$i < $n ; $i++)
{
$row = $table[$i];
if($dem % $cot == 0 )
{
$str .='<tr>';
}
$str .='<td style="text-align:center"><strong><a
href="bai2_7_detail.php?ma_sua='.$row['ma_sua'].'">'.$row['ten_sua'].'</a></strong><br />
'.$row['trong_luong'].' gr - '. number_format($row['don_gia']) .' VNĐ <br
/>
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<img src="hinh_sua/'.$row['hinh'].'" width="150px" height="170px"
border="0"/>
</td>';
if($dem % $cot == ($cot - 1))
{
$str .='</tr>';
}
$dem++;
}
?>
<table width="1000px" height="141" border="0" align="center">
<tr>
<td height="69" colspan="5"><div align="center" class="style1">THÔNG TIN CÁC SẢN
PHẨM</div></td>
</tr>
<?php echo $str ?>
</table>
</body>
</html>
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Chi tiết sản phẩm (khi click vào hình)
<body>
<?php
if(!isset($_GET['ma_sua']))
{
exit();
}
else
{
include("includes/database.php");
$ma_sua = $_GET['ma_sua'];
$db = new database();
$sql ="select ten_sua,ten_hang_sua,tp_dinh_duong,loi_ich,don_gia,hinh,trong_luong
from sua s, hang_sua h
where s.ma_hang_sua = h.ma_hang_sua AND ma_sua='{$ma_sua}'";
$db->SetQuery($sql);
$row = $db->LoadOneRow();
//print_r($row);
}
?>
<table width="609" height="303" border="1" align="center">
<tr bgcolor="#FFFFCC">
<td height="61" colspan="2"><div align="center" class="style1"><?php echo $row['ten_sua'].' -
'.$row['ten_hang_sua'] ?></div></td>
</tr>
<tr>
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<td width="200" height="209" valign="top"><img src="hinh_sua/<?php echo $row['hinh'] ?>"
width="200px" height="220px" border="0"/></td>
<td width="393" valign="top" style="padding-left:10px; padding-right:10px">
<strong>Thành phần dinh dưỡng:</strong><br />
<?php echo $row['tp_dinh_duong'] ?> <br />
<strong>Lợi ích:</strong><br />
<?php echo $row['loi_ich'] ?>
<div align="right"><strong>Trọng lượng:</strong><?php echo $row['trong_luong'] ?> gr -
<strong>Đơn giá:</strong> <?php echo number_format($row['don_gia']) ?> VNĐ</div>
</td>
</tr>
<tr>
<td align="right" style="padding-right:5px"><a href="bai2_7_list.php">Quay về</a></td>
<td> </td>
</tr>
</table>
</body>
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Thêm chi tiết
<body>
<?php
include("includes/database.php");
// tao menu hang_sua
$db = new database();
$sql = "select ma_hang_sua,ten_hang_sua from hang_sua";
$db->SetQuery($sql);
$tb_hs = $db->LoadAllRow();
//print_r($tb_hs);
$mn_hang = '';
foreach($tb_hs as $row)
{
if(isset($_POST['mn_hang_sua']) && $_POST['mn_hang_sua'] ==
$row['ma_hang_sua'])
$mn_hang .=' <option value="'.$row['ma_hang_sua'].'"
selected>'.$row['ten_hang_sua'].'</option>';
else
$mn_hang .=' <option
value="'.$row['ma_hang_sua'].'">'.$row['ten_hang_sua'].'</option>';
}
// tao menu loai sua
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$sql = "select ma_loai_sua,ten_loai from loai_sua";
$db->SetQuery($sql);
$tb_ls = $db->LoadAllRow();
//print_r($tb_hs);
$mn_loai = '';
foreach($tb_ls as $row)
{
if(isset($_POST['mn_loai_sua']) && $_POST['mn_loai_sua'] == $row['ma_loai_sua'])
$mn_loai .=' <option value="'.$row['ma_loai_sua'].'"
selected>'.$row['ten_loai'].'</option>';
else
$mn_loai .=' <option
value="'.$row['ma_loai_sua'].'">'.$row['ten_loai'].'</option>';
}
// XU LY
if(!empty($_POST['txt_ma_sua']) && !empty($_POST['txt_ten_sua']) &&
!empty($_POST['txt_trong_luong']) && !empty($_POST['txt_tp_dinh_duong']) &&
!empty($_POST['txt_don_gia']) && !empty($_POST['txt_loi_ich']) && $_FILES['f_hinh']['name'] != "")
{
$ma_sua = $_POST['txt_ma_sua'];
$ten_sua = $_POST['txt_ten_sua'];
$ma_hang_sua = $_POST['mn_hang_sua'];
$ma_loai_sua = $_POST['mn_loai_sua'];
$trong_luong = $_POST['txt_trong_luong'];
$don_gia = $_POST['txt_don_gia'];
$tp_dinh_duong = $_POST['txt_tp_dinh_duong'];
$loi_ich = $_POST['txt_loi_ich'];
// lay du lieu doi tuong f_hinh
$f_hinh = $_FILES['f_hinh'];
$ten_hinh = $f_hinh['name'] ;
$type = $f_hinh['type'];
$size = $f_hinh['size'];
$tmp = $f_hinh['tmp_name'];
if(($type =='image/jpeg' || $type =='image/bmp' || $type =='image/gif') && $size < 8000)
{
move_uploaded_file($tmp,"hinh_sua/".$ten_hinh);
$sql = "INSERT INTO sua
VALUES('{$ma_sua}','{$ten_sua}','{$ma_hang_sua}','{$ma_loai_sua}',{$trong_luong},{$don_gia},'{$t
p_dinh_duong}','{$loi_ich}','{$ten_hinh}')";
$db = new database();
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$db->SetQuery($sql);
$db->Query();
}
}
?>
<form action="" method="post" enctype="multipart/form-data">
<table width="536" border="2" align="center">
<tr>
<td colspan="2"><div align="center"><strong>THÊM SỮA MỚI</strong></div></td>
</tr>
<tr>
<td width="150">Mã sữa:</td>
<td width="368"><label>
<input type="text" name="txt_ma_sua" id="txt_ma_sua" />
</label></td>
</tr>
<tr>
<td>Tên sữa:</td>
<td><label>
<input type="text" name="txt_ten_sua" id="txt_ten_sua" />
</label></td>
</tr>
<tr>
<td>Hãng sữa;</td>
<td><label>
<select name="mn_hang_sua" id="mn_hang_sua">
<?php echo $mn_hang ?>
</select>
</label></td>
</tr>
<tr>
<td>Loại sữa:</td>
<td><select name="mn_loai_sua" id="mn_loai_sua">
<?php echo $mn_loai ?>
</select>
</td>
</tr>
<tr>
<td>Trọng lượng:</td>
<td><label>
<input type="text" name="txt_trong_luong" id="txt_trong_luong" />
(gr hoặc ml) </label></td>
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</tr>
<tr>
<td>Đơn giá:</td>
<td><label>
<input type="text" name="txt_don_gia" id="txt_don_gia" />
(VNĐ)</label></td>
</tr>
<tr>
<td>Thành phần dinh dưỡng:</td>
<td><label>
<textarea name="txt_tp_dinh_duong" cols="40" id="txt_tp_dinh_duong"></textarea>
</label></td>
</tr>
<tr>
<td>Lợi ích:</td>
<td><label>
<textarea name="txt_loi_ich" cols="40" id="txt_loi_ich"></textarea>
</label></td>
</tr>
<tr>
<td>Hình ảnh</td>
<td><label>
<input name="f_hinh" type="file" id="f_hinh" size="40" />
</label></td>
</tr>
<tr>
<td colspan="2"><div align="center">
<input type="submit" name="Btn_them_moi" id="button" value="Thêm mới" />
</div></td>
</tr>
<tr>
<td colspan="2"> </td>
</tr>
</table>
</form>
</body>
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Tìm kiêm cập nhật giá theo %
<body>
<?php $con = mysql_connect("localhost","root","") or die("loi ket noi");
$db = mysql_select_db("bookstore") or die("loi database");
mysql_query("set names 'utf8'");
?>
<form action="" method="post">
Chọn Nhà Xuất Bản :
<select name="nxb">
<?php
$sql_nxb = "SELECT * FROM nhaxb";
$result = mysql_query($sql_nxb);
$giatri = $_POST['giatri'];
while($row=mysql_fetch_array($result)){
$manxb = $row[0];
$tennxb = $row[1];
echo "<option value='".$manxb."'>".$tennxb."</option>";
}
?>
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Jacky + Cupid+Kit
</select>
Giá trị thay đổi % <input type="text" name="giatri" value="<?php echo $giatri; ?>"/> <br />
<input type="radio" checked="check" value="tang" name="dieu_chinh" /> Tăng
<input type="radio" value="giam" name="dieu_chinh" /> Giảm <br />
<input type="submit" name="submit" value="Thực hiện" />
</form>
<hr />
<?php
if(isset($_POST['submit'])){
$nxb = $_POST['nxb'];
$giatri = $_POST['giatri'];
$dieuchinh = $_POST['dieu_chinh'];
echo "<hr /><p align=left>Kết quả khi giảm giá $giatri %</p>";
if($dieuchinh=='tang')
$sql = "SELECT s. * ,ceiling(s.gia + $giatri/100 * s.gia) AS giamoi FROM sach s WHERE
manxb like '$nxb'";
else $sql = "SELECT s. * ,ceiling(s.gia - $giatri/100 * s.gia) AS giamoi FROM sach s WHERE
manxb like '$nxb'";
$result = mysql_query($sql);
echo "<table border=1 align=left>";
echo "<td><b>Tên sách</b></td><td><b>Giá mới</b></td>";
while($row = mysql_fetch_array($result)){
echo "<tr>";
echo "<td>".$row['tensach']."</td>";
echo "<td>".$row['giamoi']."</td>";
echo "</tr>";
}
echo "</table>";
}
?>
</body>
</html>
