準備默認查詢

Question

我有工作，但查詢不具備綁定值：

$this->_db->query("SELECT * from posts WHERE post_title LIKE '%$this->search_keywords%' OR post_content LIKE '%$this->search_keywords%' LIMIT 100"); 
$this->rows_results_found = $this->_db->resultset(); 

$this->results_found_num = sizeof($this->rows_results_found); 

我就重寫這一個，但沒有運氣：

$this->_db->query('SELECT * from posts WHERE post_title LIKE :search_keywords OR post_content LIKE :search_keywords LIMIT 100'); 
      $this->_db->bind(':search_keywords', '%$this->search_keywords%'); 

      $this->rows_results_found = $this->_db->resultset(); 

      $this->results_found_num = sizeof($this->rows_results_found); 

$ this-> results_found_num總是顯示爲空數組。

這是我在結果集（）（這是從另一個外部類）：

public function resultset() { 
     $this->execute(); 
     return $this->stmt->fetchAll(PDO::FETCH_ASSOC); 
    } 

我是缺少在這裏？

預先感謝您！

Answer 1

假設你有一個有效的連接調整功能爲以下內容：

public function get_posts($conn) { 
    $query = 'SELECT * 
       FROM posts 
       WHERE post_title LIKE :search_keywords1 OR 
        post_content LIKE :search_keywords2 LIMIT 100'; 
    $stmt = $conn->prepare($query); 
    $stmt->bindValue(':search_keywords1', '%'.$this->search_keywords.'%'); 
    $stmt->bindValue(':search_keywords2', '%'.$this->search_keywords.'%'); 
    $stmt->execute(); 

    return $stmt->fetchAll(PDO::FETCH_ASSOC); 
} 

用法：

$posts = $this->_db->get_posts($conn); 
//var_dump($post) 
$this->rows_results_found = count($post);