php和模板的问题

Question

PHP代码：

    class build {

        function panel() {

    $dummy="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec vestibulum velit ultricies orci pharetra elementum. In massa mauris, varius sed tempus a, iaculis sed erat. Ut sollicitudin tellus mollis arcu laoreet semper. Suspendisse ut felis odio. Aliquam auctor, tortor sit amet suscipit elementum, nunc ante dictum lectus, ac accumsan justo nunc sed velit. Sed sollicitudin varius tortor vitae varius. Aliquam interdum, nisl consectetur laoreet commodo, metus massa sagittis nisl, non venenatis lacus mi nec tortor. Ut malesuada auctor dolor, id pulvinar est malesuada sed. Aliquam sed posuere orci. Proin porttitor euismod condimentum. Integer suscipit nibh nec augue facilisis ut commodo nisi ornare. Nam sed mauris vitae justo convallis placerat. Curabitur viverra, ipsum id volutpat sollicitudin, mi nisi condimentum nulla, nec dapibus velit libero eget orci. Nam purus lectus, imperdiet pharetra pulvinar ac, sodales sit amet sem. Ut vel mollis ante. Vivamus consectetur varius risus eu hendrerit. Sed scelerisque euismod leo, quis accumsan justo venenatis eu. Ut risus lorem, aliquet id fermentum nec, auctor ut enim. Ut pretium elementum turpis vel dignissim.";


        $columns=mysql_query('SELECT * FROM `column` ORDER BY id');
        while($column=mysql_fetch_array($columns))
        {
            echo '<div class="column" id="column'.$column['id'].'" >';
            $items=mysql_query("SELECT * FROM widgets WHERE column_id='".$column['id']."' AND user='".$_COOKIE['id']."' ORDER BY sort_no");
            while($widget=mysql_fetch_array($items))
            {
                echo '
                <div class="dragbox" id="item'.$widget['id'].'">
                    <h2>'.$widget['title'].'</h2>
                        <div class="dragbox-content" ';
                if($widget['collapsed']==1)
                    echo 'style="display:none;" ';
                echo '>
                            '.$dummy.'
                        </div>
                </div>';
            }               
            echo '</div>';
        }

    }

    }


     $build_panel = new build(); 

并放入模板：

              $file = str_replace('{main_panel_window}', $build_panel, $file);

错误：类构建的对象无法转换为字符串......第47行

如何解决问题？

Answer 1

我认为正确的代码是：

class build {

    function panel()
    {
        $dummy="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec vestibulum velit ultricies orci pharetra elementum. In massa mauris, varius sed tempus a, iaculis sed erat. Ut sollicitudin tellus mollis arcu laoreet semper. Suspendisse ut felis odio. Aliquam auctor, tortor sit amet suscipit elementum, nunc ante dictum lectus, ac accumsan justo nunc sed velit. Sed sollicitudin varius tortor vitae varius. Aliquam interdum, nisl consectetur laoreet commodo, metus massa sagittis nisl, non venenatis lacus mi nec tortor. Ut malesuada auctor dolor, id pulvinar est malesuada sed. Aliquam sed posuere orci. Proin porttitor euismod condimentum. Integer suscipit nibh nec augue facilisis ut commodo nisi ornare. Nam sed mauris vitae justo convallis placerat. Curabitur viverra, ipsum id volutpat sollicitudin, mi nisi condimentum nulla, nec dapibus velit libero eget orci. Nam purus lectus, imperdiet pharetra pulvinar ac, sodales sit amet sem. Ut vel mollis ante. Vivamus consectetur varius risus eu hendrerit. Sed scelerisque euismod leo, quis accumsan justo venenatis eu. Ut risus lorem, aliquet id fermentum nec, auctor ut enim. Ut pretium elementum turpis vel dignissim.";
        $return="";

        $columns=mysql_query('SELECT * FROM `column` ORDER BY id');
        while($column=mysql_fetch_array($columns))
        {
            $return .= '<div class="column" id="column'.$column['id'].'" >';
            $items=mysql_query("SELECT * FROM widgets WHERE column_id='".$column['id']."' AND user='".$_COOKIE['id']."' ORDER BY sort_no");
            while($widget=mysql_fetch_array($items))
            {
                $return .= '
                <div class="dragbox" id="item'.$widget['id'].'">
                    <h2>'.$widget['title'].'</h2>
                        <div class="dragbox-content" ';
                if($widget['collapsed']==1)
                    $return .= 'style="display:none;" ';
                $return.= '>
                            '.$dummy.'
                        </div>
                </div>';
            }               
            $return .= '</div>';
        }
        // return the value
        return $return;
    }

}

在您的模板文件中：

$build_panel = new build(); 
$file = str_replace('{main_panel_window}', $build_panel->panel(), $file);

Answer 2

更改

 $file = str_replace('{main_panel_window}', $build_panel, $file);

为

 $file = str_replace('{main_panel_window}', $build_panel.panel(), $file);

Answer 3

问题正是错误所说的那样：您试图在调用 str_replace 时使用 build 对象，例如字符串。

也许你需要字符串转换，或者你可能需要重新思考为什么你'将 build 对象传递给 str_replace。

如果您想让 panel() 返回一个字符串，那么让它返回一个字符串而不是直接 echoing，然后编写：

$file = str_replace('{main_panel_window}', $build_panel.panel(), $file);

Answer 4

您无法按照此代码的编写方式str_replace()。我认为您打算对 $build_panel->panel() 的输出进行操作，但该函数直接回显字符串，而不是构建模板输出并将其作为字符串返回。

因此，要么在某些输出中使用wrap panel()缓冲 或让它连接并返回一个字符串。