錯誤調用非靜態方法

Question

public function upload() { 

    try { 
     $database_connect = new DatabaseConnect(); 
     $connection = $database_connect->getConnection(); 

     $this->populate_database($connection); //line 43 
     $connection->close(); 

     return true; 

    } catch (Exception $exp) { 
     echo $exp->getMessage(); 
     return false; 

    } 

} 

private function populate_database(mysqli $connection){ 
    $query = "insert into bases (img_url) values ($this->image_name)"; 
    $result = $connection->query($query); 

    if (!$result) die($connection->error); 

    if (!$this->update_linked_table($connection)) { 
     echo "linked table not updated"; 
    } 
} 

我打電話民辦非靜態方法那麼爲什麼會出現這個錯誤：

Fatal error: Using $this when not in object context in /var/www/html/CocExplore/html5BoilerPlate/php/LocalImage.php on line 43

Answer 1

呼叫方法非靜態。例如，如果您致電YourClass::upload()，請將其替換爲類似$class = new YourClass(); $class->upload();