请帮我.. 致命错误:在第32行的C:\ xampp \ htdocs \ Rikarsen.hol.es \ core \ init.php中调用非对象的成员函数count()
我正在学习PHP OOP登录/注册系统。此错误在记住我(第19/23部分)中确定。
我必须告诉我,如果其他代码
的的init.php 的
<?php
session_start();
$GLOBALS ['config'] = array(
'mysql' => array(
'host' => '127.0.0.1',
'username' => 'root',
'password' => '',
'db' => 'rikars'
),
'remember' => array(
'cookie_name' => 'hash',
'cookie_expiry' => 604800
),
'session' => array(
'session_name' => 'user',
'token_name' => 'token'
)
);
spl_autoload_register(function($class) {
require_once 'classes/' . $class . '.php';
});
require_once 'functions/sanitize.php';
if(Cookie::exists(Config::get('remember/cookie_name')) && Session::exists(Config::get('session/session_name'))) {
$hash = Cookie::get(Config::get('remember/cookie_name'));
$hashCheck = DB::getInstance()->get('users_sessions', array('hash', '=', $hash));
if($hashCheck->count()) {
echo 'asass';
}
}
我认为我在 DB.php
中犯了一个错误<?php
class DB {
private static $_instance = null;
private $_pdo,
$_query,
$_error = false,
$_result,
$_count = 0;
private function __construct() {
try {
$this->_pdo = new PDO('mysql:host=' . Config::get('mysql/host') . ';dbname=' . Config::get('mysql/db'), Config::get('mysql/username'), Config::get('mysql/password'));
} catch(PDOException $e) {
die($e->getMessage());
}
}
public static function getInstance() {
if(!isset(self::$_instance)) {
self::$_instance = new DB();
}
return self::$_instance;
}
public function query($sql, $params = array()) {
$this->_error = false;
if($this->_query = $this->_pdo->prepare($sql)) {
$x = 1;
if(count($params)){
foreach($params as $param){
$this->_query->bindValue($x, $param);
$x++;
}
}
if($this->_query->execute()){
$this->_results = $this->_query->fetchAll(PDO::FETCH_OBJ);
$this->_count = $this->_query->rowCount();
} else {
$this->_error = true;
}
}
return $this;
}
public function action($action, $table, $where = array()) {
if(count($where) === 3) {
$operators = array('=', '>', '<', '>=', '<=');
$field = $where[0];
$operator = $where[1];
$value = $where[2];
if(in_array($operator, $operators)) {
$sql = "{$action} FROM {$table} WHERE {$field} {$operator} ?";
if(!$this->query($sql, array($value))->error()) {
return $this;
}
}
}
return false;
}
public function get($table, $where) {
return $this->action('SELECT *', $table, $where);
}
public function delete($table, $where) {
return $this->action('DELETE *', $table, $where);
}
public function insert($table, $fields = array()) {
$keys = array_keys($fields);
$values = null;
$x = 1;
foreach($fields as $field) {
$values .= '?';
if($x < count($fields)) {
$values .= ', ';
}
$x++;
}
$sql = "INSERT INTO {$table} (`" . implode('`, `', $keys) . "`) VALUES ({$values})";
if(!$this->query($sql, $fields)->error()) {
return true;
}
return false;
}
public function update($table, $id, $fields) {
$set = '';
$x= 1;
foreach ($fields as $name => $value) {
$set .= "{$name} = ?";
if($x < count($fields)) {
$set .= ', ';
}
$x++;
}
$sql = "UPDATE {$table} SET {$set} WHERE id = {$id}";
if($this->query($sql, $fields)->error()) {
return true;
}
return false;
}
public function results() {
return $this->_results;
}
public function first() {
return $this->results()[0];
}
public function error() {
return $this->_error;
}
public function count() {
return $this->_count;
}
public function ins() {
$instance = DB::getInstance();
$instance->get('users',array('user_id','=','1'));
if (!$instance->Count()) {
echo 'No user';
} else {
echo 'User exists';
}
}
}
?>
答案 0 :(得分:3)
您的方法操作返回false但您期望对象。
if(Cookie::exists(Config::get('remember/cookie_name')) && Session::exists(Config::get('session/session_name'))) {
$hash = Cookie::get(Config::get('remember/cookie_name'));
$hashCheck = DB::getInstance()->get('users_sessions', array('hash', '=', $hash));
if($hashCheck === false) {
echo 'Action return false';
} else {
$count = $hashCheck->count();
if($count) {
echo 'Its object and count ='.$count;
}
}
}
答案 1 :(得分:1)
确保get方法中的表名和列名正确无误。我遇到了同样的问题,这是适合我的解决方案。