致命错误:在不在对象上下文中时使用$ this

时间:2010-06-21 16:31:45

标签: php object class fatal-error

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):

2 个答案:

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。