Wie CRUD mit PDO-Verbindung?

Question

Ich möchte CRUD mit PDO-Verbindung

Ich weiß, wie Insert-Update erstellen und löschen mit msql_query(), aber ich habe keine Ahnung, wie man das mit PDO Connection.

Answer 1

Unten ist das Beispiel jener

class connection{ 

    public $cnn; 

    public function __construct(){ 

     $host = 'localhost'; 
     $db_name = "db_name"; 
     $username = "db_username"; 
     $password = "db_password"; 

     try { 
      $this->cnn = new PDO("mysql:host={$host};dbname={$db_name}", $username, $password);   
     } catch (PDOException $e) { 
      echo 'Connection failed: ' . $e->getMessage(); 
     } 

    } 


    public function select($query){ //this function is created for get data 
     $result = $this->cnn->query($query); 
     return $result->fetchAll(PDO::FETCH_ASSOC); 
    } 

    public function insert($query){ //this function is created for insert data. it will be return last inserted id. 
     $this->cnn->exec($query); 
     return $this->cnn->lastInsertId();  
    } 

    public function update($query){ //this function is created for update data and it will be return effected rows (which are updated) 
     return $this->cnn->exec($query);   
    } 

    public function delete($query){ // this function is use to delete data. 
     return $this->cnn->exec($query);   
    } 
} 

$action = new connection; 

$result = $action->select("select * from table_name"); 
print_r($result); 

$result = $action->insert("insert into table_name set column_1 = 'first_value', column_2='second_value'"); 
$result = $action->update("update table_name set column_1 = 'first_value', column_2='second_value' where id=1"); 
$result = $action->delete("delete from table_name where id=1");