如何通过创建变量来显示结果？

Question

我是PHP新手，所以请原谅我的混乱。对于像我这样的人来说，这是一个非常复杂的查询。

请参阅下面的查询。现在，所有结果都显示在$row‘’Post‘中；相反，我希望能够执行以下操作：

row=$row‘’some_row‘；$somerow2 =$row’‘some_row 2’；

然后可以通过上面使用的$variables在任何地方使用它。

我试着在下面使用它，但它不起作用：

if($rows == 0)
{
print("");

}
elseif($rows > 0)
{
while($row = mysql_fetch_array($query))
{

$postid = htmlspecialchars($row['post_id']);
$postname = htmlspecialchars($row['post_name']);


print("$postname and the id is $postid");
}

}

我如何才能做到这一点？

完整查询：

$denied = "Denied";
$userid = Drawn from db for user viewing;

$sql = "SELECT  concat(  (select client_name from user_accounts where 
User_id = tv.User_id), ' commanded ' , title_1  ,' on ', CAST(other_date AS 
CHAR(10)) ) AS Post FROM client_visits tv where User_id in (select contact_id 
from contacts where User_id = '$userid' ) and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_2  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM client_notes tv where User_id in (select contact_id from 
contacts where User_id = '$userid' ) and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_3  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM client_media tv where User_id in (select contact_id 
from contacts where User_id = '$userid' ) and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_4  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM client_stats tv where User_id in (select contact_id from 
contacts where User_id = '$userid' ) and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_5 ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM client_current_list  tv
where User_id in (select contact_id from contacts where User_id = '$userid' )
and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_6 ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM client_past  tv
where User_id in (select contact_id from contacts where User_id = '$userid' )
and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_7  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM  client_listers  tv
where User_id in (select contact_id from contacts where User_id = '$userid' )
and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_8  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM    client_events  tv
where User_id in (select contact_id from contacts where User_id = '$userid' )
and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_9  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM    client_admissions  tv
where User_id in (select contact_id from contacts where User_id = '$userid' )
and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'
union
SELECT  concat(  (select client_name from user_accounts where User_id 
= tv.User_id), ' commanded ' , title_10  ,' on ', CAST(other_date AS CHAR(10)) )
AS Post FROM    client_immu  tv
where User_id in (select contact_id from contacts where User_id = '$userid' )
and user_allowed = '$denied'
or User_id in (select User_id from contacts where contact_id = '$userid')
and user_allowed = '$denied'";

$query = mysql_query($sql) or die ("Error: ".mysql_error());

$result = mysql_query($sql);

if ($result == "")
{
echo "";
}
echo "";


$rows = mysql_num_rows($result);

if($rows == 0)
{
print("");

}
elseif($rows > 0)
{
while($row = mysql_fetch_array($query))
{

print($row['Post']);
}
}

Answer 1

您可以将每一行存储在一个数组中，然后挑选出您想要使用的行。

if($rows == 0)
{
    print("I have no rows!");
}
else
{
   $allrows = array();
   while($row = mysql_fetch_array($query))
   {
       $allrows[] = $row;
   }
   $row1 = $allrows[0];
   $row2 = $allrows[1];
   echo $row1['Post']; // Print out first row
   echo $row2['Post']; // Print out second row
   var_dump($allrows); // Print out all the rows and the structure of this array
}

如果你想在任何地方都使用这些变量，你需要将它们设置为全局变量，但我建议不要将全局变量用于类似的事情或一般情况下的任何事情。