见
class Browser{
var $type = "";
public function e(){
return $this->type;
}
}
使用时
$b = new Browser('human');
echo $b->e();
我的maen类型没有出现,我把它作为新的ArchiveBrowser(var类型);
答案 0 :(得分:2)
class Browser{
var $type = "";
function __construct($type){
$this->type = $type;
}
public function echo_type(){
return $this->type;
}
}
答案 1 :(得分:1)
echo
是保留字。此外,您的班级名为Browser
,但您要实例化ArchiveBrowser
。
答案 2 :(得分:1)
class Browser
{
// Always declare whether a variable is public or private
private $type = null;
// A constructor - gets excecuted every time you create a class
public function __construct($type)
{
// Note that $type here is not the same as $type above
// The $type above is now $this->type
$this->type = $type; // Store the type variable
}
// Your function e()
public function e ()
{
return $this->type;
}
// __toString() method. (May also be useful)
// it gets excecuted every time you echo the class, see below.
public function __toString ()
{
return $this->e(); // I chose to return function e() output here
}
}
用法示例:
$b = new Browser('Human'); // Note, that this executes __construct('Human');
echo $b->e(); // Echos 'Human'
$b = new Browser('Lolcat'); // Excecutes __construct('Lolcat');
echo $b->__toString(); // Echos 'Lolcat'
echo $b; // Echos 'Lolcat', equivalent to statement above
//Also:
$c = (string) $b;
echo $c; // Echos 'Lolcat'
答案 3 :(得分:0)
ArchiveBrowser应该扩展浏览器,或者你应该使用Browser而不是ArchiveBrowser。