WKHtmlToPDF::__construct PHP Method

    public function __construct()
    {
        if (Yii::app()->params['wkhtmltopdf_path']) {
            if (!file_exists(Yii::app()->params['wkhtmltopdf_path'])) {
                if (!($this->wkhtmltopdf = trim(`which wkhtmltopdf`))) {
                    throw new Exception('wkhtmltopdf not found in the current path.');
                }
            } else {
                $this->wkhtmltopdf = Yii::app()->params['wkhtmltopdf_path'];
            }
        }
        $banner = $this->execute($this->wkhtmltopdf . ' 2>&1');
        if (preg_match('/reduced functionality/i', $banner)) {
            throw new Exception('wkhtmltopdf has not been compiled with patched QT and so cannot be used.');
        }
        $this->left = Yii::app()->params['wkhtmltopdf_footer_left'];
        $this->middle = Yii::app()->params['wkhtmltopdf_footer_middle'];
        $this->right = Yii::app()->params['wkhtmltopdf_footer_right'];
        $this->top_margin = Yii::app()->params['wkhtmltopdf_top_margin'];
        $this->bottom_margin = Yii::app()->params['wkhtmltopdf_bottom_margin'];
        $this->left_margin = Yii::app()->params['wkhtmltopdf_left_margin'];
        $this->right_margin = Yii::app()->params['wkhtmltopdf_right_margin'];
    }