<form method="post" action="<?php echo $edit ? 'edit_book.php' : 'insert_book.php'; ?>">
<table border="0">
<tr>
<td>ISBN:</td>
<td></td>
</tr>
<tr>
<td>Book Title:</td>
<td></td>
</tr>
<tr>
<td>Book Author:</td>
<td><input type="text" name="author" value="<?php echo $edit ? $book['author'] : ''; ?>"/></td>
</tr>
<tr>
<td>Category:</td>
<td>
<select name="catid">
<?PHP
$cat_array = get_categories();
foreach($cat_array as $thiscat)
{
echo "<option value=\"". $thiscat['catid'] ."\"";
if(($edit) && ($thiscat['catid'] == $book['catid']))
{
echo " selected";
}
echo ">". $thiscat['catname'] ."";
}
?>
PHP\">
}
?>
</td>
</tr>
</table>
function display_password_form() //显示更改密码表单
{
?>
<form action="change_password.PHP" method="post">
<table width="250" cellpadding="2" cellspacing="0" bgcolor="#cccccc">
<tr>
<td>Old password:</td>
<td><input type="password" name="old_passwd" size="16" maxlength="16"/></td>
</tr>
<tr>
<td>New password:</td>
<td><input type="password" name="new_passwd" size="16" maxlength="16"/></td>
</tr>
<tr>
<td>Repeat new password:</td>
<td><input type="password" name="new_passwd2" size="16" maxlength="16"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="Change password"/></td>
</tr>
</table>
function insert_category($catname) //目录插入
{
$conn = db_connect(); //数据库连接
$query = "select *
from categories
where catname='". $catname ."'";
$result = $conn ->query($query);
if((!$result) || ($result ->num_rows != 0))
return false;
$query = "insert into categories values
('','". $catname ."')";
$result = $conn ->query($query);
if(!$result)
return false;
else
return true;
}
function insert_book($isbn,$title,$author,$catid,$price,$description) //图书插入
{
$conn = db_connect(); //连接数据库
$query = "select * from books
where isbn='". $isbn ."'";
$result = $conn ->query($query);
if((!$result) || ($result ->num_rows != 0))
return false;
$query = "insert into books values
('". $isbn ."','". $author ."','". $title ."','". $catid ."','". $price ."','". $description ."')";
$result = $conn ->query($query);
if(!$result)
return false;
else
return true;
}
function update_category($catid,$catname) //更改目录名称
{
$conn = db_connect(); //连接数据库
$query = "update categories
set catname='". $catname ."'
where catid='". $catid ."'";
$result = @$conn ->query($query);
if(!$result)
return false;
else
return true;
}
function update_book($oldisbn,$isbn,$description)
{
$conn = db_connect(); //连接数据库
$query = "update books
set isbn='". $isbn ."',title='". $title ."',author='". $author ."',catid='". $catid ."',price ='". $price ."',description='". $description ."'
where isbn='". $oldisbn ."'";
$result = @$conn ->query($query);
if(!$result)
return false;
else
return true;
}
function delete_category($catid) //删除目录
{
$conn = db_connect(); //连接数据库
$query = "select *
from books
where catid='". $catid ."'";
$result = @$conn ->query($query);
if((!$result) || (@$result ->num_rows > 0)) //如果该目录有图书，无法删除该目录
return false;
$query = "delete from categories
where catid='". $catid ."'";
$result = @$conn ->query($query);
if(!$result)
return false;
else
return true;
}
function delete_book($isbn) //删除图书
{
$conn = db_connect(); //连接数据库
$query = "delete from books
where isbn='". $isbn ."'";
$result = @$conn ->query($query);
if(!$result)
return false;
else
return true;
}
?>
