我像往常一样创造我的课程。我创建了成员变量,我设置了setter和getter,我使用$ this来调用成员变量的值。但由于某些原因,我现在得到致命错误:在不在对象上下文中时使用$ this
这是常规的php文件,它应该使用它们的值
填充成员变量try
{
$add_advert = new Site();
$add_advert->add_time = mysqli_real_escape_string($link, $_POST['time']);
$add_advert->add_url = mysqli_real_escape_string($link, $_POST['URL']);
$add_advert->add_advertisement($_FILES);
$feedback = "<div class='succes'>Advertisement succesfully added!</div>";
}
catch(Exception $e)
{
$feedback = "<div class='error'>";
$feedback .= $e->getMessage();
$feedback .= "</div>";
}
成员变量:
class Site
{
protected $add_url;
protected $add_time;
protected $extend_id;
setter和getter:
public function __set($p_sProperty, $p_sValue)
{
switch($p_sProperty)
{
case "add_url":
$this->add_url = $p_sValue;
break;
case "add_time":
$this->add_time = $p_sValue;
break;
case "extend_id":
$this->extend_id = $p_sValue;
break;
}
}//end of setter
public function __get($p_sProperty)
{
$vResult = "";
switch($p_sProperty)
{
case "add_url":
$vResult = $this->add_url;
break;
case "add_time":
$vResult = $this->add_time;
break;
case "extend_id":
$vResult = $this->extend_id;
break;
}
return $vResult;
}// end of getter
以及我使用$ this对象的函数(它只是函数的一部分),这是造成问题的$ this-&gt; add_time:
public static function add_advertisement($files)
{
global $link, $userid, $useridentify;
if(!isset($files['image']['tmp_name']) || empty($files['image']['tmp_name'])):
throw new exception("No image given, enter an image please.");
endif;
if($_POST['URL'] == NULL || $_POST['URL'] == "http://"):
throw new exception("No url given, enter a valid url please.");
endif;
if($_POST['time'] == NULL):
throw new exception("You did not select any option to advertise. Select one of the available advertising options.");
endif;
if(!$path = Uploader::upload_file($files, 'images/', 'gif|jpg|jpeg|jpe|png', 300000)):
throw new exception("Could not upload the image.");
endif;
if(self::get_balance() >= $this->add_time):
答案 0 :(得分:7)
您不能在静态方法中使用$this
。根据定义,静态方法没有关联的实例。
答案 1 :(得分:3)
您不能在静态函数中使用$this
,因为没有实例可以解决。