Friend_array擦拭

Question

我有一个系统，用户的朋友存储在与该用户关联的阵列中。我有一个函数，只能从这个朋友数组中删除1个人。但是，当从remove friend按钮触发此代码时，它会删除整个数组。我将数组设置为用逗号分隔用户（因此各种$usernameComma变量）

if (@$_POST['removefriend']) {
  //Friend array for logged in user
  $add_friend_check = mysql_query("SELECT friend_array FROM users WHERE username='$user'");
  $get_friend_row = mysql_fetch_assoc($add_friend_check);
  $friend_array = $get_friend_row['friend_array'];
  $friend_array_explode = explode(",",$friend_array);
  $friend_array_count = count($friend_array_explode);

  //Friend array for user who owns profile
  $add_friend_check_username = mysql_query("SELECT friend_array FROM users WHERE     username='$username'");
  $get_friend_row_username = mysql_fetch_assoc($add_friend_check_username);
  $friend_array_username = $get_friend_row_username['friend_array'];
  $friend_array_explode_username = explode(",",$friend_array_username);
  $friend_array_count_username = count($friend_array_explode_username);

  $usernameComma = ",".$username;
  $usernameComma2 = $username.",";

  $userComma = ",".$user;
  $userComma2 = $user.",";

  if (strstr($friend_array,$usernameComma)) {
    $friend1 = str_replace("$usernameComma","",$friend_array);
  }
  else
  if (strstr($friend_array,$usernameComma2)) {
   $friend1 = str_replace("$usernameComma2","",$friend_array);
  }
  else
  if (strstr($friend_array,$username)) {
   $friend1 = str_replace("$username","",$friend_array);
  }
  //Remove logged in user from other persons array
  if (strstr($friend_array,$userComma)) {
   $friend2 = str_replace("$userComma","",$friend_array);
  }
  else
  if (strstr($friend_array,$userComma2)) {
   $friend2 = str_replace("$userComma2","",$friend_array);
  }
  else
   if (strstr($friend_array,$user)) {
   $friend2 = str_replace("$user","",$friend_array);
  }

  $friend2 = "";

  $removeFriendQuery = mysql_query("UPDATE users SET friend_array='$friend1' WHERE username='$user'");
  $removeFriendQuery_username = mysql_query("UPDATE users SET friend_array='$friend2' WHERE username='$username'");
  echo "Friend Removed ...";

}


 ?>

Answer 1

看起来你总是通过在查询之前设置$ friend2 =“”来消除第二个用户（“其他人数组”）的friend_array。

但是，请务必遵循Mike Brant的评论中的建议。这是一个更好，更好的方法。改变可能需要做更多的工作，但最终结果对于今后的发展将更有用。