图书管理程序（三）_PHP

图书查询部分：
if(!$UploadAction):
?>
//本程序是为输出书名，作者、出版社资料而设。
//编者：孔秀祥。日期：2001/3/25
?>









else:
session_start();
require "config.php3";

$b_price=$b_price_a.".".$b_price_b;

$UploadAction=0;
$repeat=0; //是不是重复了。
$TimeLimit=0; //设置超时限制时间缺省时间为 30秒设置为0时为不限时
set_time_limit($TimeLimit);
@MYSQL_CONNECT($hostname,$dbusername,$dbpassword) OR DIE("不能连接数据库！");
@mysql_select_db("$dbname") or die("不能选择数据库！");
//$q="select books.books_id, books.books_name,author.first_name,author.last_name,publisher.publisher_name from books,author,books_author,publisher where books.books_name="$b_name" and books.publisher_id=publisher.publisher_id and books.books_id=books_author.books_id and books_author.author_id=author.author_id";
if($b_name!="")
$bn="books.books_name="$b_name" and ";
if($p_name!="")
$pn="publisher.publisher_name="$p_name" and ";
if($a_first1!="")
$af="author.first_name="$a_first1" and ";
if($a_last1!="")
$al="author.last_name="$a_last1" and ";
if($p_year!=""){
$date_p="books.date_pub rlike '^$p_year.*' and ";
}
if($isbn!="")
$is="books.ISBN="$isbn" and ";
$q="select books.books_id, books.books_name,author.first_name,author.last_name,publisher.publisher_name from books,author,books_author,publisher
where $bn $pn $af $al $date_p $is books.publisher_id=publisher.publisher_id and books.books_id=books_author.books_id and books_author.author_id=author.author_id order by books.books_name";


$r = @mysql_query($q);
if(!$r){
echo "查询无效
";
exit;
}
if(mysql_num_rows($r)<1){
$msg="没有符合要求的记录。";
xueroom_error_exit($msg,$PHP_SELF);

}

while($count=mysql_fetch_array($r)){
$books_id=$count[0];
$books_name=$count[1];
$first_name=$count[2];
$last_name=$count[3];
$publisher_name=$count[4];
if($book!=$books_id){
$repeat ;
echo "
".$repeat."、";
echo "《".$books_name."》";
echo "出版社：".$count[4];
echo " 作者：";
}
echo "$first_name$last_name ";
$book=$books_id;
}

echo"
返回 ";
echo"";

?>
endif;
?>