[英]Fatal error: Using $this when not in object context
I'm creating my class like I always do. 我像往常一样创建班级。 I create the member variables, I setup the setter and getter and the I use $this to call the values of the member variables.
创建成员变量,设置setter和getter,然后使用$ this调用成员变量的值。 but for some reason now I'm get the fatal error: Using $this when not in object context
但是由于某种原因,我现在遇到了致命错误:不在对象上下文中使用$ this
Here is the regular php file which should populates the member variables with their value 这是常规的php文件,应使用其值填充成员变量
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>";
}
the member variables: 成员变量:
class Site
{
protected $add_url;
protected $add_time;
protected $extend_id;
the setter and getter: 设置者和获取者:
public function __set($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
and the function where I use the $this object (it's only a part of the function), it's the $this->add_time that is causing the problem: 以及我在其中使用$ this对象的函数(它只是函数的一部分),是导致问题的$ this-> 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):
You cannot use $this
in a static method. 您不能在静态方法中使用
$this
。 Static methods, by definition, have no associated instance. 根据定义,静态方法没有关联的实例。
您不能在静态函数中使用$this
,因为没有实例可以使用。
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