使用PDO进行多选搜索

Question

我想列出所选的选项。但是有3个单独的选择框。 “品牌”，“燃料”和“齿轮”。例如，当我选择福特品牌时，它被列出但如果我选择带有品牌的燃料和装备，我会得到一个错误的清单。怎么会这样？

数据库含义

TABLE（araclar =“CARS TABLE”）arac_marka =“BRANDS”arac_vites =“GEAR”arac_benzin =“FUEL”

AND FORM ACTION（SELF）

<form action="" method="get">
   <div class="col-xs-12 col-sm-3 col-md-3">
      <select name="arac_marka" class="form-control">
         <option value="">Marka Seçin</option>
         <? $marsor=$db->prepare('SELECT * FROM araclar'); 
            $marsor->execute(); 
            while ($marcek=$marsor->fetch(PDO::FETCH_ASSOC)){ ?> 
         <option value="<?=$marcek['arac_marka'];?>">
            <?=$marcek['arac_marka'];?>
         </option>
         <? } ?>
      </select>
   </div>
   <div class="col-xs-12 col-sm-3 col-md-3">
      <select name="arac_benzin" class="form-control">
         <option value="">Yakıt Tipi</option>
         <option value="Benzin">Benzin</option>
         <option value="Dizel">Dizel</option>
         <option value="Hybrid">Hybrid</option>
         <option value="LPG">LPG</option>
      </select>
   </div>
   <div class="col-xs-12 col-sm-3 col-md-3">
      <select name="arac_vites" class="form-control">
         <option value="">Vites</option>
         <option value="Benzin">Otomatik</option>
         <option value="Dizel">Manuel</option>
         <option value="Hybrid">Yarı Otomatik</option>
      </select>
   </div>
   <div class="col-xs-12 col-sm-2 col-md-3 col-lg-2">
      <input class="btn btn-primary" type="submit" name="dtara" value="Filtrele"> 
   </div>
   <div class="col-xs-12 col-sm-2 col-md-3 col-lg-2">
      <a href="araclarimiz" class="btn btn-raised">Tüm Araçlar</a>
   </div>
</form>

AND LISTING

<? if(isset($_GET['dtara'])) { 
    $marka=$_GET['arac_marka']; 
    $benzin=$_GET['arac_benzin']; 
    $vites=$_GET['arac_vites']; 
    $asql=$db->prepare("SELECT * FROM araclar 
    WHERE arac_marka='$marka' 
    OR arac_benzin='$benzin' 
    OR arac_vites='$vites'"); 
    $asql->execute(); 
} else { 
    $asql=$db->prepare('select * from araclar'); 
    $asql->execute(); 
} 
while ($acek=$asql->fetch(PDO::FETCH_ASSOC)){?> 
    //Listing Here 
<? } ?>