PDO и ООП
Функция select() ничего не выводит. На страницу лезет следующее:
PHP Notice: Undefined variable: db
PHP Fatal error: Call to a member function prepare() on a non-object
Код страницы с классом, который подключаю:
/** * GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann * (http://qbnz.com/highlighter/ and http://geshi.org/) */ .php.geshi_code {font-family:monospace;} .php.geshi_code .imp {font-weight: bold; color: red;} .php.geshi_code .kw1 {color: #b1b100;} .php.geshi_code .kw2 {color: #000000; font-weight: bold;} .php.geshi_code .kw3 {color: #990000;} .php.geshi_code .co1 {color: #666666; font-style: italic;} .php.geshi_code .co2 {color: #666666; font-style: italic;} .php.geshi_code .co3 {color: #0000cc; font-style: italic;} .php.geshi_code .co4 {color: #009933; font-style: italic;} .php.geshi_code .coMULTI {color: #666666; font-style: italic;} .php.geshi_code .es0 {color: #000099; font-weight: bold;} .php.geshi_code .es1 {color: #000099; font-weight: bold;} .php.geshi_code .es2 {color: #660099; font-weight: bold;} .php.geshi_code .es3 {color: #660099; font-weight: bold;} .php.geshi_code .es4 {color: #006699; font-weight: bold;} .php.geshi_code .es5 {color: #006699; font-weight: bold; font-style: italic;} .php.geshi_code .es6 {color: #009933; font-weight: bold;} .php.geshi_code .es_h {color: #000099; font-weight: bold;} .php.geshi_code .br0 {color: #009900;} .php.geshi_code .sy0 {color: #339933;} .php.geshi_code .sy1 {color: #000000; font-weight: bold;} .php.geshi_code .st0 {color: #0000ff;} .php.geshi_code .st_h {color: #0000ff;} .php.geshi_code .nu0 {color: #cc66cc;} .php.geshi_code .nu8 {color: #208080;} .php.geshi_code .nu12 {color: #208080;} .php.geshi_code .nu19 {color:#800080;} .php.geshi_code .me1 {color: #004000;} .php.geshi_code .me2 {color: #004000;} .php.geshi_code .re0 {color: #000088;} .php.geshi_code span.xtra { display:block; }
// Класс для работы с БД
class DB {
//Параметры для подключения
protected $hostname = "localhost";
protected $password = "bek7b7";
protected $user = "home";
protected $name = "project";
public function connect() { //Подключаемся...
try {
$db = new PDO('mysql:host='.$this->hostname.'; dbname='.$this->name, $this->user, $this->password);
$db->query('SET NAMES utf8');
return true;
}
catch (PDOException $e) {
echo $e->getMessage();
}
}
public function select($table, $where){ // Получаем данные из БД
$sth = $db->prepare('SELECT * FROM :table WHERE :where');
$sth->bindParam(':table', $table);
$sth->bindParam(':where', $where);
$sth->execute();
return '=P';
}
}
Код основной страницы:
/** * GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann * (http://qbnz.com/highlighter/ and http://geshi.org/) */ .php.geshi_code {font-family:monospace;} .php.geshi_code .imp {font-weight: bold; color: red;} .php.geshi_code .kw1 {color: #b1b100;} .php.geshi_code .kw2 {color: #000000; font-weight: bold;} .php.geshi_code .kw3 {color: #990000;} .php.geshi_code .co1 {color: #666666; font-style: italic;} .php.geshi_code .co2 {color: #666666; font-style: italic;} .php.geshi_code .co3 {color: #0000cc; font-style: italic;} .php.geshi_code .co4 {color: #009933; font-style: italic;} .php.geshi_code .coMULTI {color: #666666; font-style: italic;} .php.geshi_code .es0 {color: #000099; font-weight: bold;} .php.geshi_code .es1 {color: #000099; font-weight: bold;} .php.geshi_code .es2 {color: #660099; font-weight: bold;} .php.geshi_code .es3 {color: #660099; font-weight: bold;} .php.geshi_code .es4 {color: #006699; font-weight: bold;} .php.geshi_code .es5 {color: #006699; font-weight: bold; font-style: italic;} .php.geshi_code .es6 {color: #009933; font-weight: bold;} .php.geshi_code .es_h {color: #000099; font-weight: bold;} .php.geshi_code .br0 {color: #009900;} .php.geshi_code .sy0 {color: #339933;} .php.geshi_code .sy1 {color: #000000; font-weight: bold;} .php.geshi_code .st0 {color: #0000ff;} .php.geshi_code .st_h {color: #0000ff;} .php.geshi_code .nu0 {color: #cc66cc;} .php.geshi_code .nu8 {color: #208080;} .php.geshi_code .nu12 {color: #208080;} .php.geshi_code .nu19 {color:#800080;} .php.geshi_code .me1 {color: #004000;} .php.geshi_code .me2 {color: #004000;} .php.geshi_code .re0 {color: #000088;} .php.geshi_code span.xtra { display:block; }
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<?php
require_once 'classes/DB.class.php';
$db = new DB();
$db->connect();
echo $db->select('us', 'pass = bek7b7');
?>
</body>
</html>
P.S.В оригинале на месте "return =P;" стоит вывод информации о пользователе.
Только начал учить ООП, и уже такие грабли)
PHP Notice: Undefined variable: db
PHP Fatal error: Call to a member function prepare() on a non-object
Код страницы с классом, который подключаю:
/** * GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann * (http://qbnz.com/highlighter/ and http://geshi.org/) */ .php.geshi_code {font-family:monospace;} .php.geshi_code .imp {font-weight: bold; color: red;} .php.geshi_code .kw1 {color: #b1b100;} .php.geshi_code .kw2 {color: #000000; font-weight: bold;} .php.geshi_code .kw3 {color: #990000;} .php.geshi_code .co1 {color: #666666; font-style: italic;} .php.geshi_code .co2 {color: #666666; font-style: italic;} .php.geshi_code .co3 {color: #0000cc; font-style: italic;} .php.geshi_code .co4 {color: #009933; font-style: italic;} .php.geshi_code .coMULTI {color: #666666; font-style: italic;} .php.geshi_code .es0 {color: #000099; font-weight: bold;} .php.geshi_code .es1 {color: #000099; font-weight: bold;} .php.geshi_code .es2 {color: #660099; font-weight: bold;} .php.geshi_code .es3 {color: #660099; font-weight: bold;} .php.geshi_code .es4 {color: #006699; font-weight: bold;} .php.geshi_code .es5 {color: #006699; font-weight: bold; font-style: italic;} .php.geshi_code .es6 {color: #009933; font-weight: bold;} .php.geshi_code .es_h {color: #000099; font-weight: bold;} .php.geshi_code .br0 {color: #009900;} .php.geshi_code .sy0 {color: #339933;} .php.geshi_code .sy1 {color: #000000; font-weight: bold;} .php.geshi_code .st0 {color: #0000ff;} .php.geshi_code .st_h {color: #0000ff;} .php.geshi_code .nu0 {color: #cc66cc;} .php.geshi_code .nu8 {color: #208080;} .php.geshi_code .nu12 {color: #208080;} .php.geshi_code .nu19 {color:#800080;} .php.geshi_code .me1 {color: #004000;} .php.geshi_code .me2 {color: #004000;} .php.geshi_code .re0 {color: #000088;} .php.geshi_code span.xtra { display:block; }
// Класс для работы с БД
class DB {
//Параметры для подключения
protected $hostname = "localhost";
protected $password = "bek7b7";
protected $user = "home";
protected $name = "project";
public function connect() { //Подключаемся...
try {
$db = new PDO('mysql:host='.$this->hostname.'; dbname='.$this->name, $this->user, $this->password);
$db->query('SET NAMES utf8');
return true;
}
catch (PDOException $e) {
echo $e->getMessage();
}
}
public function select($table, $where){ // Получаем данные из БД
$sth = $db->prepare('SELECT * FROM :table WHERE :where');
$sth->bindParam(':table', $table);
$sth->bindParam(':where', $where);
$sth->execute();
return '=P';
}
}
Код основной страницы:
/** * GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann * (http://qbnz.com/highlighter/ and http://geshi.org/) */ .php.geshi_code {font-family:monospace;} .php.geshi_code .imp {font-weight: bold; color: red;} .php.geshi_code .kw1 {color: #b1b100;} .php.geshi_code .kw2 {color: #000000; font-weight: bold;} .php.geshi_code .kw3 {color: #990000;} .php.geshi_code .co1 {color: #666666; font-style: italic;} .php.geshi_code .co2 {color: #666666; font-style: italic;} .php.geshi_code .co3 {color: #0000cc; font-style: italic;} .php.geshi_code .co4 {color: #009933; font-style: italic;} .php.geshi_code .coMULTI {color: #666666; font-style: italic;} .php.geshi_code .es0 {color: #000099; font-weight: bold;} .php.geshi_code .es1 {color: #000099; font-weight: bold;} .php.geshi_code .es2 {color: #660099; font-weight: bold;} .php.geshi_code .es3 {color: #660099; font-weight: bold;} .php.geshi_code .es4 {color: #006699; font-weight: bold;} .php.geshi_code .es5 {color: #006699; font-weight: bold; font-style: italic;} .php.geshi_code .es6 {color: #009933; font-weight: bold;} .php.geshi_code .es_h {color: #000099; font-weight: bold;} .php.geshi_code .br0 {color: #009900;} .php.geshi_code .sy0 {color: #339933;} .php.geshi_code .sy1 {color: #000000; font-weight: bold;} .php.geshi_code .st0 {color: #0000ff;} .php.geshi_code .st_h {color: #0000ff;} .php.geshi_code .nu0 {color: #cc66cc;} .php.geshi_code .nu8 {color: #208080;} .php.geshi_code .nu12 {color: #208080;} .php.geshi_code .nu19 {color:#800080;} .php.geshi_code .me1 {color: #004000;} .php.geshi_code .me2 {color: #004000;} .php.geshi_code .re0 {color: #000088;} .php.geshi_code span.xtra { display:block; }
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<?php
require_once 'classes/DB.class.php';
$db = new DB();
$db->connect();
echo $db->select('us', 'pass = bek7b7');
?>
</body>
</html>
P.S.В оригинале на месте "return =P;" стоит вывод информации о пользователе.
Только начал учить ООП, и уже такие грабли)
1 ответов
class DB {
//Параметры для подключения
protected $hostname = "localhost";
protected $password = "bek7b7";
protected $user = "home";
protected $name = "project";
protected $db;
public function connect() { //Подключаемся...
try {
$this->db = new PDO('mysql:host='.$this->hostname.'; dbname='.$this->name, $this->user, $this->password);
$this->db->query('SET NAMES utf8');
return true;
}
catch (PDOException $e) {
echo $e->getMessage();
}
}
public function select($table, $where){ // Получаем данные из БД
$sth = $this->db->prepare('SELECT * FROM :table WHERE :where');
$sth->bindParam(':table', $table);
$sth->bindParam(':where', $where);
$sth->execute();
return '=P';
}
}