php - 警告 : Missing 1 argument

Question

知道为什么我会收到此错误:

Warning: Missing argument 1 for person::__construct(), called in /home/fishbein/public_html/dev/OOP/index.php on line 5 and defined in /home/fishbein/public_html/dev/OOP/class_lib.php on line 6

Warning: Missing argument 1 for person::__construct(), called in /home/fishbein/public_html/dev/OOP/index.php on line 6 and defined in /home/fishbein/public_html/dev/OOP/class_lib.php on line 6

使用这段代码:

<?
    class person {

            var $name;

            function __construct($persons_name) {       
            $this->name = $persons_name;        
            }

            function set_name($new_name) {
                $this->name = $new_name;
            }

            function get_name() {
                return $this->name;
            }

    }
?>

我也在我的索引文件中使用它:

$tyler = new person("Tyler");

Answer 1

实例化时，您执行了:$obj = new person(); 而不是 $obj = new person("joe");