使用instance來進行Tracy Panel

// PHP程式碼
include __DIR__.'/vendor/autoload.php';

use Tracy\Debugger;
use Tracy\IBarPanel;

class CustomPanel implements IBarPanel
{
    /**
     * Renders HTML code for custom tab.
     * @return string
     */
    public function getTab()
    {
        return 'sql';
    }

    /**
     * Renders HTML code for custom panel.
     * @return string
     */
    public function getPanel()
    {
        $data = $this->data;
        ob_start();
        require __DIR__.'/custompanel.php';

        return ob_get_clean();
    }

    public function push($data)
    {
        $this->data[] = $data;
    }

    public $data = [];

    private static $_instance;

    public static function instance()
    {
        if (static::$_instance === null) {
            static::$_instance = new static;
        }

        return static::$_instance;
    }
}

// 開發環境
$environment = Debugger::DEVELOPMENT;
// 啟用
Debugger::enable($environment);

Debugger::getBar()
    ->addPanel(CustomPanel::instance());

$i = 0;
CustomPanel::instance()->push([
    'sql' => 'select * from user where id = '.++$i,
]);

CustomPanel::instance()->push([
    'sql' => 'select * from user where id = '.++$i,
]);

CustomPanel::instance()->push([
    'sql' => 'select * from user where id = '.++$i,
]);

//樣板<h1>SQL</h1>

<div class="tracy-inner">
    <table>
        <?php foreach ($data as $key => $value): ?>
            <tr><td><?php echo $value['sql']; ?></td></tr>
        <?php endforeach ?>
    </table>
</div>