我不断收到此错误“在不在对象上下文中时使用$ this”
实例化。
$axre = new Axre();
if (!filter_var($this->email, FILTER_VALIDATE_EMAIL)){
echo "yes";
} else {
echo"no";
}
我如何进入对象上下文?
它是受保护的$ email,我需要它受到保护,因为它在表单上。
//通过调用构造函数填充此框架中的大多数对象,但是 //这个有各种切入点。
class Axre extends Base {
protected $email;
protected $user_name;
protected $temp_token;
protected $sign_in_token;
protected $UserShoppingList;
function __construct($email = null) {
if (strpos($email, '@') === false) {
$this->sign_in_token = $email;
} else {
$this->email = $email;
}
}
答案 0 :(得分:0)
$ this变量是对当前类实例的特殊引用。你在一个没有任何意义的课堂之外使用。
来自PHP示例
class Vegetable {
var $edible;
var $color;
function Vegetable($edible, $color="green")
{
$this->edible = $edible; // $this refers to the instance of vegatable
$this->color = $color; // ditto
}
}
$this->variable; //This does not make sense because it's not inside an instance method
答案 1 :(得分:0)
class Axre extends Base {
protected $email;
protected $user_name;
protected $temp_token;
protected $sign_in_token;
protected $UserShoppingList;
function __construct($email = null) {
if (strpos($email, '@') === false) {
$this->sign_in_token = $email;
} else {
$this->email = $email;
}
}
function isValidEmail() {
if (filter_var($this->email, FILTER_VALIDATE_EMAIL)) {
return true;
}
return false;
}
}
现在使用它你可以实例化该类并调用isValidEmail方法来获得真/假结果。
$test = new Axre($email);
$validEmail = $test->isValidEmail();
你不能在课外使用$ this并期望它能够正常工作。