PHP如何在MVC模式中从布局渲染函数？

Question

I've a code with im working for.

  class View
{
    public $model;
    public $function;
    public $content;

    public function __construct( $model )
    {
        $this->model = $model;
        $this->templateLoader( get_class( $this->model ));
    }

    public function templateLoader( $model )
    {
        $template       = "View/Layout/" . $model . ".tpl";

        if ( file_exists( $template ))
        {
            $this->getContent( $template );
            $this->searchForTags();
            $this->runFunction();
        }
    }

    public function getContent( $template )
    {
        $this->content = file_get_contents( $template );
    }

    public function searchForTags()
    {
        $start = strpos( $this->content, '<%')+strlen('<%');
        $end = strpos( $this->content, '%>');
        $part = $end - $start;

        if ( $part > 0)
            $this->function = substr($this->content, $start, $part);
    }

    public function runFunction()
    {
        if ( $this->function )
        {
            var_dump( $this->model->{$this->function} );
        }
    }
}

This class load my template regarding classname. In the template if i have function example:

<td class="right error"> <% getLoginValidatorMsg() %></td>

i want to run it and replace into the value before it shows in my template. Somehow i cant run above function. Error:

Notice: Undefined property: LoginForm::$ getLoginValidatorMsg() in /media/htdocs/ver1/loginmanager/init/View.php on line 54

If i try to run:

$this->model->getLoginValidatorMsg();

will return me the value what i looking for.

Answer 1

It appears from the error you have a space between $ and getLoginValidatorMsg so you need to remove that space using a correctly placed trim() or just str_replace() on the whole thing. Also, it is saying it's looking for a property so you need to add () on your $this->model->{$this->function} so it turns it to a method:

$this->model->{$this->function}();

Alternatively, you can use call_user_func() / call_user_func_array().