重新創建爲對象和類PHP

Question

我有點難住。我從來沒有在PHP中使用過多的對象和類，但有人建議我重新做一些代碼。
我想要做的是使$拍賣對象屬性，同時保存所有的行數據。

現在，我做echo $auctions[1]['title'];來回顯id = 1標題的列表。 我希望重新創建它，以便它成爲一個對象。

這裏是我當前的代碼，

$sqlquery = "SELECT * FROM auctions"; 
if ($result = $db->query($sqlquery)) { 
    while ($row = $result->fetch_assoc()) { 
     $auctions[$row['id']]['id'] = $row['id']; 
     $auctions[$row['id']]['title'] = $row['title']; 
     $auctions[$row['id']]['featured_image'] = $row['featured_image']; 
     $auctions[$row['id']]['description'] = $row['description']; 
     $auctions[$row['id']]['date'] = $row['date']; 
     $auctions[$row['id']]['location'] = $row['location']; 
     $auctions[$row['id']]['highlights'] = $row['highlights']; 
     $auctions[$row['id']]['catagories'] = $row['catagories']; 
     $auctions[$row['id']]['notes'] = $row['notes']; 
     $auctions[$row['id']]['terms'] = $row['terms']; 
     $auctions[$row['id']]['contact'] = $row['contact']; 
    } 
} 

我沒有對如何做到這一點的任何想法，但如果有人可以給我一點提示點我的方向，這將是非常讚賞！ :)

Answer 1

我會在這裏寫一個最小的片段現價：

首先，讓我們爲我們的所有型號的基類：

abstract class Model() { 
    public $fields = array(); 
    private $data = array(); 
    public function setValues(array $vals) { 
    foreach($vals as $key=>$value) { 
     if (in_array($key, static::$fields)) { 
     $this->data[$key] = $value; 
     } 
    } 
    } 
    public function get($key) { 
     if (in_array($key, static::$fields) && isset($this->data[$key])) { 
     return $this->data[$key]; 
     } 
     return null; // or throw Exception) 
    } 
} 

接下來，創建一些具體的模型：

class Users extends Model { 
    public static $fields = array('id', 'name'); 
} 

我們現在可以使用它：

$users = array(); 
$sqlquery = "SELECT * FROM Users"; 
if ($result = $db->query($sqlquery)) { 
    while ($row = $result->fetch_assoc()) { 
     $user = new User(); 
     $user->setValues($row); 
     $users[] = $user; 
    } 
} 

你可以直接在用戶模型中添加一些用戶特定的方法（又稱登錄）。

你也應該實現其他型號的方法，如getById，getByQuery，save等，並沒有直接使用SQL查詢，因爲機型能夠做到這本身

Answer 2

您可以在對象存儲的值一樣

$obj = new stdClass; //create new standard class object 

$obj->id = $row['id']; //assign property value 
$obj->title = $row['title']; 
//further properties 

...等等

Answer 3

所有你上面列出所需的成員變量創建一個類auctions（如id， title，​​等）。接下來在類內部創建一個setter方法（例如setValues()），該方法可以接受$row。

$sqlquery = "SELECT * FROM auctions"; 
$auction = new Auctions(); 
if ($result = $db->query($sqlquery)) { 
    while ($row = $result->fetch_assoc()) { 

     $auction->setValues($row); 
     // do something with $auction... 
    } 
} 

除了明確的設置方法，您還可以使用神奇的方法__set()。

Answer 4

你真的要創建對象（像這樣的東西包含的信息爲一個拍賣類型的實例組成的數組：

class Auction 
{ 
    var $id = null; 
    var $title = null; 
    var $featured_image = null; 
    var $description = null; 
    var $date = null; 
    var $location = null; 
    var $highlights = null; 
    var $catagories = null; 
    var $notes = null; 
    var $terms = null; 
    var $contact = null; 
} 

$sqlquery = "SELECT * FROM auctions"; 
if ($result = $db->query($sqlquery)) { 
    while ($row = $result->fetch_assoc()) { 
     $newAuction = new Auction(); 
     $newAuction->id = $row['id']; 
     $newAuction->title = $row['title']; 
     $newAuction->featured_image = $row['featured_image']; 
     $newAuction->description = $row['description']; 
     $newAuction->date = $row['date']; 
     $newAuction->location = $row['location']; 
     $newAuction->highlights = $row['highlights']; 
     $newAuction->catagories = $row['catagories']; 
     $newAuction->notes = $row['notes']; 
     $newAuction->terms = $row['terms']; 
     $newAuction->contact = $row['contact']; 
     $auctions[$row['id']] = $newAuction; 
    } 
} 

請注意，您有拼寫錯誤「類別」（你有「名作「）

Answer 5

我建議你使用PDO

class Auction 
{ 
    public $id; 
    public $title; 
    public $featured_image; 
    public $description; 
    public $date; 
    public $location; 
    public $highlights; 
    public $catagories; 
    public $notes; 
    public $terms; 
    public $contact; 

    // This will return $all being an array of objects of class Auction 
    public static function getAll() { 
     $query = "SELECT * FROM auctions"; 

     $statement = $db->prepare($query); 
     if (!$statement->execute()) 
      return false; 
     $all = $statement->fetchAll(PDO::FETCH_CLASS, "Auction"); 
     return $all; 
    } 
}