我有一個PHP類的定義,使用所有典型的數據庫方法(Crud,等等)稱爲databaseObject的類。我最近改變了我的數據庫結構,以便每個表中的id列不再被稱爲「id」,現在無論表格中保存了id + id(例如:Companies Table的ID爲「companyId」)。因此,現在在擴展databaseObject的類中,我包含一個名爲$ table_id的靜態變量,該變量保存該表的id的名稱。現在我需要調用該類變量時遇到了一種情況。示例代碼如下。此代碼正在PHP 5.3中運行。調用一個變量的PHP類變量
//databaseObject Delete Method;
public function delete() {
global $database;
//DELETE FROM table WHERE condition LIMIT 1
//escape all values to prevent SQL injection
// - use LIMIT 1
$sql = "DELETE FROM ".static::$table_name;
$sql .= " WHERE ".static::$table_id."=". $database->escape_value($this->id);
$sql .= " LIMIT 1";
$database->query($sql);
return ($database->affected_rows() ==1) ? true : false;
}
//Actual Class that creates the issue
require_once(LIB_PATH.DS.'database.php');
require_once(LIB_PATH.DS.'databaseobject.php');
class Contact extends DatabaseObject {
protected static $table_name="contacts";
protected static $table_id="contactId";
protected static $db_fields = array('contactId','companyId','contactName', 'phone', 'fax', 'email');
public $contactId;
public $companyId;
public $contactName;
public $phone;
public $fax;
public $email;
}
//Code that calls the method
$contact = Contact::find_by_id($_GET['contactId']);
if($contact && $contact->delete()) {
$session->message("The Contact was deleted.");
log_action('Contact Deleted', "Contact was deleted by User ID {$session->id}");
redirect_to("../companies/viewCompany.php?companyId={$contact->companyId}");
} else {
$session->message("The Contact could not be deleted");
redirect_to('../companies/listCompanies.php');
}
那麼自我呢? – ComFreek
我不認爲這是問題。他已經有了靜態成員,所以我認爲他已經知道如何與他們合作。我敢打賭,現在他問的是如何訪問在$ table_id中的名字的類字段。這是有道理的。 – AlexanderMP