Library Management Program (3)_PHP Tutorial

Book query part:
if(!$UploadAction):
?>
//This program is to output book title, author and publisher information Designed.
//Editor: Kong Xiuxiang. Date: 2001/3/25
?>



< ;BODY>

ACTION= "" METHOD = "POST" >

ISBN

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

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

$UploadAction=0;
$repeat=0; //Is it repeated?
$TimeLimit=0; //设置超时限制时间缺省时间为 30秒设置为0时为不限时
set_time_limit($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;
?>

http://www.bkjia.com/PHPjc/315956.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/315956.htmlTechArticle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 ? HTMLHEAD TITLE书目查询...