php - 动态分组查询的 AND 和 OR 部分

Question

所以我有这个:

$query = "SELECT personaname, profileurl, avatarmedium, location, country, rank, rankurl, role, map, skype, teamspeak, microphone, esea, faceit, cevo, competitive FROM csgolistings WHERE active = 1";

if(isset($_POST['location']) && $_POST['location'] != "") {
  $location = $_POST['location'];
  $query .= " AND location = '$location'"; 
}

if(isset($_POST['country']) && $_POST['country'] != "") {
  $country = $_POST['country'];
  $query .= " AND country = '$country'"; 
}

if(isset($_POST['rank']) && $_POST['rank'] != "") {
  $location = $_POST['rank'];
  $query .= " AND rank = '$rank'"; 
}

if(isset($_POST['competitive']) && $_POST['competitive'] != "") {
  $query .= " AND competitive = 1"; 
}

if(isset($_POST['cevo']) && $_POST['cevo'] != "") {
  $query .= " AND cevo = 1"; 
}

if(isset($_POST['faceit']) && $_POST['faceit'] != "") {
  $query .= " AND faceit = 1"; 
}

if(isset($_POST['esea']) && $_POST['esea'] != "") {
  $query .= " AND esea = 1"; 
}

if(isset($_POST['microphone']) && $_POST['microphone'] != "") {
  $query .= " AND microphone = 1"; 
}

if(isset($_POST['teamspeak']) && $_POST['teamspeak'] != "") {
  $query .= " AND teamspeak = 1"; 
}

if(isset($_POST['skype']) && $_POST['skype'] != "") {
  $query .= " AND skype = 1"; 
}

if(isset($_POST['role']) && $_POST['role'] != "") {
  $role = $_POST['role'];
  $query .= " AND role = '$role'"; 
}

if(isset($_POST['map']) && $_POST['map'] != "") {
  $map = $_POST['map'];
  $query .= " AND map = '$map'"; 
}

所以我最终得到的是 $query 是这样的(取决于发布的搜索过滤器:

SELECT personaname, profileurl, avatarmedium, location, country, rank, rankurl, role, 
map, skype, teamspeak, microphone, esea, faceit, cevo, competitive FROM csgolistings WHERE active = 1 AND rank = '$rank' AND cevo = 1

我的问题是，我将如何让它将位置和国家/地区分组为 AND，然后将其余部分作为 OR？我需要在 OR 周围放置方括号，以便它找到所有来自位置和国家 AND (cevo = 1, rank = '$rank') 的人。我可以在平面查询中轻松地做到这一点，但我正在处理 $_POST 数据，其中一些数据可能不会发布。这取决于用户的要求。

希望这是有道理的。 任何帮助是极大的赞赏。 谢谢!!

Answer 1

你可以试试这个:

<?php
   $required = array ('location', 'country');
   $optional = array ('microphone', 'faceit', ... );

   $ands = array( '1' => '1');

   foreach($required as $req)
   {
      if(isset($_POST[$req]) && $_POST[$req] != '')
      {
        $ands[$req] = "$req = '{$_POST[$req]}'";
      }
   }

   $ors = array();

   foreach($optional as $req)
   {
      if(isset($_POST[$req]) && $_POST[$req] != '')
      {
        $ors[$req] = "$req = '{$_POST[$req]}'";
      }
   }

   $and_part = implode(" AND ", $ands);
   $or_part = empty($ors) ? "1" : implode(" OR ", $ors);

   $query = "select .... from ... WHERE $and_part AND ($or_part) ... ";
?>

然后，您可以通过将参数添加到顶部声明的适当数组来轻松扩展查询，而无需添加到巨大的 if 链。

给定此 POST 输入:

   $_POST = array(
     'location' => 'city',
     'country' => 'antarctica',
     'microphone' => 'loud',
     'faceit' => 'yes'
   );

$query 将包含 select .... from ... WHERE 1 AND location = 'city' AND country = 'antarctica' AND (microphone = 'loud' OR faceit = '是') ...