Question

我想在$query_bookname之后添加$query_author和$_GET['category'] 我怎样才能做到这一点？（双引号和单引号让我很困惑）

$query_bookname = "AND book_name LIKE '%".$_GET['book_name']."%' ";
$query_author = "AND author LIKE '%".$_GET['author']."%' ";

$result = mysql_query("
    SELECT * FROM book
    WHERE cate_name = '".$_GET['category']."' AND status = 1
");

Answer 1

你想这样做，但是你需要解决代码中的弱点（根据Shankar Damodaran）：

$result = mysql_query("
SELECT * FROM book
WHERE cate_name = '".$_GET['category']."' AND status = 1
$query_bookname
$query_author
");

Answer 2

试试这个

$result = mysql_query("
    SELECT * FROM book
    WHERE cate_name = '".$_GET['category']." ".$query_author." ".$query_author." AND status = 1
");

Answer 3

试试这个

$result = mysql_query("
    SELECT * FROM book
    WHERE cate_name = '".$_GET['category']."' AND status = 1
    $query_bookname 
    $query_author
");

Answer 4

你可以这样试试

$result = mysql_query("SELECT * FROM book
  WHERE cate_name = '".$_GET['category']."' AND ".$query_bookname.$query_bookname." status = 1");

Answer 5

PHP代码：

$q="";
$q .= " AND book_name LIKE '%".$_GET['book_name']."%' ";
$q .= " AND author LIKE '%".$_GET['author']."%' ";
$result = mysql_query("SELECT * FROM book WHERE cate_name = '".$_GET['category']."' AND status = 1 $q");

Answer 6

$query_bookname = ''; $query_author = '';
if(isset($_GET['book_name']) && $_GET['book_name']!=''){
   $query_bookname = " AND book_name LIKE '%".$_GET['book_name']."%' ";
}
if(isset($_GET['author']) && $_GET['author']!=''){
$query_author = " AND author LIKE '%".$_GET['author']."%' ";
}
$result = mysql_query("SELECT * FROM book   WHERE cate_name = '".$_GET['category']."'  $query_bookname  $query_author AND status = 1");

如何在mysql_query中添加变量

6 个答案: