从HTML表单的数据库显示数据

我想通过HTML表单使用PHP显示我的数据库结果。一旦用户点击提交按钮，根据他们在每个字段中输入的内容，结果应该相应地显示。从HTML表单的数据库显示数据

E.g.如果我在我的下拉菜单中点击“房间”，并且在价格和其他字段的文本字段中指定了特定价格，则应显示与我搜索的内容相关的任何内容。

我能做到这一点的下拉菜单，但我不知道我怎么可以输入多个值，当我点击提交的数据相应地产生。

这是我到目前为止已经完成：

<!DOCTYPE html> 
<html> 
<head> 
    <meta charset="UTF-8"> 
    <title></title> 
</head> 
<body> 
    <form action="dropdown2.php" method="POST"> 
     <select name="testing" type="text"> 
      <option value="Choose">Choose type of stay</option> 
      <option value="Flat">Flat</option> 
      <option value="Room">Room</option> 
      <option value="Apartment">Apartment</option> 
      <option value="Villa">Villa</option> 
     </select> 
     <p></p> 
     <table> 
     <tr> 
      <td width="14%" class="label">Minimum Price MYR</td> 
      <td width="42%"><input type="text" name="textfield4" id="textfield4" class="text" /></td> 
      <td class="label">Maximum Price MYR</td> 
      <td><input type="text" name="textfield2" id="textfield2" class="text" /></td> 
     </tr> 
     <tr> 
      <td class="label">Bed Rooms</td> 
      <td> 
       <label> 
       <input type="text" name="search" id="textfield5" class="text smalltextarea" /> 
       </label> 
      </td> 
      <td class="label">Bathrooms</td> 
      <td><input type="text" name="textfield3" id="textfield3" class="text" /></td> 
     </tr> 
     </table> 
     <p></p> 
     <input type="submit" value="Submit" name="submit"> 
    </form> 
    <?php 
    mysql_connect("localhost", "root", "") or die("Error connecting to database: ".mysql_error()); 

    mysql_select_db("test") or die(mysql_error()); 
    if(isset($_POST['testing'])){ 
    $query = $_POST['testing']; 

    $min_length = 3; 

    if(strlen($query) >= $min_length){ 
     $query = htmlspecialchars($query);   
     $query = mysql_real_escape_string($query); 

     $raw_results = mysql_query("SELECT * FROM rooms 
      WHERE (`name` LIKE '%".$query."%') OR (`price` LIKE '%".$query."%') OR (`description` LIKE '%".$query."%')") or die(mysql_error()); 
     if(mysql_num_rows($raw_results) > 0){ 

     while($results = mysql_fetch_array($raw_results)){ 
      echo "<p><h3>".$results['name']."</h3>"."RM " .$results['price']."</p>"."<p>".$results['description']."</p>"; 
     } 

    } 
    else{ 
     echo "No results"; 
    } 
     } 
     else{ 
      echo "Minimum length is ".$min_length; 
     } 
    } 
    ?> 
</body> 
</html>

我新的PHP和MySQL ...任何帮助表示赞赏！

来源

2017-04-07 Jasmine Montez

''mysql_ *'函数从PHP v5.5开始已弃用，自v7.0开始已被删除。他们不应该用于新的代码，应该换成[mysqli]（http://php.net/manual/en/book.mysqli.php）或[PDO]（http://php.net/manual /en/book.pdo.php）尽可能等效。 –

''没有类型。 –

第一个ID说更改名字的东西多一点调和还你缺少一个名称或说明字段不知道哪一个（因为名称不类似于数据库字段）

取代MySQL的PDO或mysqli的我用PDO在这个例子中因为如果升级到PHP 7个MySQL的功能被删除（如建议在上述评论）

，而不是MySQL的世外桃源等，你可以使用一个事先准备好的声明

也查询中缺少的内容是其他职位字段，如评论中的建议，例如有多少卫生间，最低价格，最高价格等（这些字段由用户发布但未在查询中使用）您对所有这些值使用相同的后置字段您的查询

现在基于您的字段我假设例如有人填写minprice = 12和descr = flat，结果都必须有最低价格12和像平的描述，因此您需要更改或者是你在你的查询使用，是基于其场均填写

这里有点上一个例子，如何去了解它：

<!DOCTYPE html> 
<html> 
<head> 
    <meta charset="UTF-8"> 
    <title></title> 
</head> 
<body> 
    <form action="" method="POST"> 
     <select name="description" type="text"> 
      <option value="Choose">Choose type of stay</option> 
      <option value="Flat">Flat</option> 
      <option value="Room">Room</option> 
      <option value="Apartment">Apartment</option> 
      <option value="Villa">Villa</option> 
     </select> 
     <p></p> 
     <table> 
     <tr> 
      <td width="14%" class="label">Minimum Price MYR</td> 
      <td width="42%"><input type="text" name="minprice" id="textfield4" class="text" /></td> 
      <td class="label">Maximum Price MYR</td> 
      <td><input type="text" name="maxprice" id="textfield2" class="text" /></td> 
     </tr> 
     <tr> 
      <td class="label">Bed Rooms</td> 
      <td> 
       <label> 
       <input type="text" name="bedrooms" id="textfield5" class="text smalltextarea" /> 
       </label> 
      </td> 
      <td class="label">Bathrooms</td> 
      <td><input type="text" name="bathrooms" id="textfield3" class="text" /></td> 
     </tr> 
     </table> 
     <p></p> 
     <input type="submit" value="Submit" name="submit"> 
    </form> 
    <?php 

     $minDescriptionLength = 3; 
     if(isset($_POST['description'])) { 
      $descr = $_POST['description']; 

      if(strlen($descr) >= $minDescriptionLength) { 
       $connectionConfigArr = array('host' => 'localhost', 'dbname' => 'test', 'user' => 'root', 'password' => ''); 
       // here we are making the database connection, 
       // first param = connection string, second param = user, third param = password 
       $dbh = new PDO(
        'mysql:host=' . $connectionConfigArr['host'] . ';dbname=' . $connectionConfigArr['dbname'], 
        $connectionConfigArr['user'], 
        $connectionConfigArr['password'] 
       ); 


       $bindParamArr = array(); 

       //since we check this one in the start i assumed it's required so we can use it in the base for the query 
       $query = 'SELECT * FROM rooms WHERE `description` LIKE :descr '; 

       //here for each extra field that is filled in we basicaly are going to add it to the query string 
       //and we push the value to the bindParamArray which will after we added the query add the values safely to the query 
       if(isset($_POST['minprice']) && $_POST['minprice']) { 
        $query .= 'AND `price` > :minprice '; 
        array_push($bindParamArr, array('field' => ':minprice', 'value' => $_POST['minprice'], 'type' => PDO::PARAM_INT)); 
       } 
       if(isset($_POST['maxprice']) && $_POST['maxprice']) { 
        $query .= 'AND `price` < :maxprice '; 
        array_push($bindParamArr, array('field' => ':maxprice', 'value' => $_POST['maxprice'], 'type' => PDO::PARAM_INT)); 
       } 
       if(isset($_POST['bathrooms']) && $_POST['bathrooms']) { 
        $query .= 'AND `bathrooms` = :bathrooms '; 
        array_push($bindParamArr, array('field' => ':bathrooms', 'value' => $_POST['bathrooms'], 'type' => PDO::PARAM_INT)); 
       } 
       if(isset($_POST['bedrooms']) && $_POST['bedrooms']) { 
        $query .= 'AND `bedrooms` = :bedrooms '; 
        array_push($bindParamArr, array('field' => ':bedrooms', 'value' => $_POST['bedrooms'], 'type' => PDO::PARAM_INT)); 
       } 

       //we still need to push the description to the array 
       array_push($bindParamArr, array('field' => ':descr', 'value' => '%' . $descr . '%', 'type' => PDO::PARAM_STR)); 


       //here we prepare the query 
       $stmt = $dbh->prepare($query); 

       //here we bind the params safely 
       foreach($bindParamArr as $bParam) { 
        $stmt->bindParam($bParam['field'], $bParam['value'], $bParam['type']); 
       } 

       $stmt->execute(); 

       //use this to get the amount of rows the query returned 
       $rowCount = $stmt->rowCount(); 

       if($rowCount > 0) { 
        //we loop through the stmt fetch function which will iterate through the resultset 
        while($row = $stmt->fetch(PDO::FETCH_ASSOC)) { 
         echo "<p><h3>".$row['name']."</h3>"."RM " .$row['price']."</p>"."<p>".$row['description']."</p>"; 
        } 
       } 
       else { 
        echo "No results"; 
       } 
      } 
      else { 
       echo "Minimum length is ".$minDescriptionLength; 
      } 
     } 
    ?> 
</body> 
</html>

来源

2017-04-07 16:29:46 herriekrekel

从HTML表单的数据库显示数据

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