使用第二個函數的一個mysql函數的值

Question

我想查詢我的數據庫並創建值以供以後在另一個函數中使用。我的第一個函數（get_users（））應該查詢請求數據庫並查找爲特定的global_id列出的所有用戶 - 此查詢總是最多有4個用戶。然後我想使用第二個函數（get_results（）），並將從第一個函數（get_users（））中檢索的值插入到第二個函數中。換句話說，我需要在第二個函數中將users1,2,3,4放入get_results（$ user1，$ user2，$ user3，$ user4）中。

希望有人能幫忙！這裏是我的功能：

 function get_users($global_id) 
    { 
     $result = mysql_query("SELECT user_purchased FROM requests WHERE global_id = '$global_id'"); 
     $row = mysql_fetch_row($result); 
     $user1 = $row[0]; 
     $user2 = $row[0]; 
     $user3 = $row[0]; 
     $user4 = $row[0]; 
    } 
    function get_results($user1, $user2, $user3, $user4) 
    { 
     $result = mysql_query("SELECT * FROM results WHERE username != '$user1' 
     AND username != '$user2' 
     AND username != '$user3' 
     AND username != '$user4' 
     ORDER BY distance"); 
     ...more stuff to do here with the query 
    } 

感謝

Answer 1

呼叫的第一個內部的第二功能：

function get_users($global_id) 
    { 
     $result = mysql_query("SELECT user_purchased FROM requests WHERE global_id = '$global_id'"); 
$count = 0;   
while($row = mysql_fetch_array($result)) 
     { 
     $user[$count] = $row; 
     $count++; 
     } 
    get_results($user[0],$user[1],$user[2],$user[3]); 
    } 

    function get_results($user1, $user2, $user3, $user4) 
    { 
     $result = mysql_query("SELECT * FROM results WHERE username != '$user1' 
     AND username != '$user2' 
     AND username != '$user3' 
     AND username != '$user4' 
     ORDER BY distance"); 
     ...more stuff to do here with the query 
    } 

你甚至可以簡化get_results功能有一個變量數組，而不是4 varialbles

function get_results($users) 
     { 
      $result = mysql_query("SELECT * FROM results WHERE username != '".$users[0]."' 
      AND username != '".$users[1]."' 
      AND username != '".$users[2]."' 
      AND username != '".$users[3]."' 
      ORDER BY distance"); 
      ...more stuff to do here with the query 
     } 

而且你應該在第一個函數中像這樣調用它

get_results($users); 

Answer 2

將值作爲參數發送到另一個函數。

function get_users($global_id) 
{ 
    $result = mysql_query("SELECT user_purchased FROM requests WHERE global_id = '$global_id'"); 
    $row = mysql_fetch_row($result); 
    $user1 = $row[0]; 
    $user2 = $row[0]; 
    $user3 = $row[0]; 
    $user4 = $row[0]; 

    //now send 
    get_results($user1, $user2, $user3, $user4); 
}