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$query就是这样（取决于POST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，如何让它将位置和国家分组为AND，然后其余的东西是OR？我需要在OR周围放置括号，以便它找到来自位置和国家的所有人AND（cevo = 1，rank ='$ rank'）。我可以在平面查询中轻松完成，但我正在处理$ _POST数据，其中一些可能不会被发布。这取决于用户请求的内容。

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) ... ";
?>

您可以通过将参数添加到顶部声明的相应数组来轻松扩展查询，而无需添加到巨型if链。

给出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 = 'yes') ...

Answer 2

首先，在处理需要通过分隔符加入的字符串时，它可能是最简单的（可以是＆＃34;，＆＃34;到＆＃34; AND＆＃34; ）创建一个array来保存它们，然后使用join($delim, $array)函数生成一个新字符串，每个旧字符串之间都有分隔符。您可以在PHP手册中查看join的文档。

其次，我的方法如下：尝试获取国家，并尝试获取位置。如果无法获取（因为它们不在POST中），请将相应的变量设置为null。

然后将所有其余字符串收集到一个数组中，比如说$conditions，省略＆＃34; AND＆＃34;或＆＃34;，＆＃34;或者诸如此类的，因为我们稍后会有条件地添加适当的一个。这是一个例子：

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

然后：如果有位置和国家（即两者都设置为非空值），则构造查询：

$query .= "location = '$location' AND country = '$country' AND (" . join(",", $conditions) . ")";

否则，将任何位置或国家/地区与由＆＃34;加入的$条件组合在一起。 AND＆＃34;，像这样：

if ($location) { 
    $conditions[] = "location = '$location'";
}
if ($country) {
    $conditions[] = "country = '$country'";
}
$query .= join(" AND ", $conditions);

希望这会有所帮助。

Answer 3

如果我没错，你希望得到你的疑问，

where active =1 and (location = '$location' and country = '$country') or (rank = '$rank' etc etc )

嗯，如果是这样的话，你可以简单地将你的位置和国家/地区串联起来If and else IF statements，就像这样

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

然后，你可以继续与你进行正常的接触，如果与OR一起使用

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

$query.= ")";

你知道这种事。你按照你的要求做组合。你也可以使用不同的变量来实现eacj＆＃34;和＆＃34;和＆＃34;或＆＃34;部分，然后将它们连接在一起。根据我的建议，这会更好。希望这可以帮助。

动态分组查询的AND和OR部分

3 个答案: