MY_Loader::_ci_load PHP Method

    protected function _ci_load($_ci_data)
    {
        // Set the default data variables
        foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val) {
            ${$_ci_val} = isset($_ci_data[$_ci_val]) ? $_ci_data[$_ci_val] : FALSE;
        }
        $file_exists = FALSE;
        // Set the path to the requested file
        if (is_string($_ci_path) && $_ci_path !== '') {
            $_ci_x = explode('/', $_ci_path);
            $_ci_file = end($_ci_x);
        } else {
            $_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION);
            $_ci_file = $_ci_ext === '' ? $_ci_view . '.php' : $_ci_view;
            foreach ($this->_ci_view_paths as $_ci_view_file => $cascade) {
                if (file_exists($_ci_view_file . $_ci_file)) {
                    $_ci_path = $_ci_view_file . $_ci_file;
                    $file_exists = TRUE;
                    break;
                }
                if (!$cascade) {
                    break;
                }
            }
        }
        if (!$file_exists && !file_exists($_ci_path)) {
            show_error('Unable to load the requested file: ' . $_ci_file);
        }
        // This allows anything loaded using $this->load (views, files, etc.)
        // to become accessible from within the Controller and Model functions.
        $_ci_CI = $this->get_instance();
        foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var) {
            if (!isset($this->{$_ci_key})) {
                $this->{$_ci_key} =& $_ci_CI->{$_ci_key};
            }
        }
        /*
         * Extract and cache variables
         *
         * You can either set variables using the dedicated $this->load->vars()
         * function or via the second parameter of this function. We'll merge
         * the two types and cache them so that views that are embedded within
         * other views can have access to these variables.
         */
        if (is_array($_ci_vars)) {
            foreach (array_keys($_ci_vars) as $key) {
                if (strncmp($key, '_ci_', 4) === 0) {
                    unset($_ci_vars[$key]);
                }
            }
            $this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $_ci_vars);
        }
        extract($this->_ci_cached_vars);
        /*
         * Buffer the output
         *
         * We buffer the output for two reasons:
         * 1. Speed. You get a significant speed boost.
         * 2. So that the final rendered template can be post-processed by
         *  the output class. Why do we need post processing? For one thing,
         *  in order to show the elapsed page load time. Unless we can
         *  intercept the content right before it's sent to the browser and
         *  then stop the timer it won't be accurate.
         */
        ob_start();
        // If the PHP installation does not support short tags we'll
        // do a little string replacement, changing the short tags
        // to standard PHP echo statements.
        if (!is_php('5.4') && !ini_get('short_open_tag') && config_item('rewrite_short_tags') === TRUE) {
            echo eval('?>' . preg_replace('/;*\\s*\\?>/', '; ?>', str_replace('<?=', '<?php echo ', file_get_contents($_ci_path))));
        } else {
            include $_ci_path;
            // include() vs include_once() allows for multiple views with the same name
        }
        log_message('info', 'File loaded: ' . $_ci_path);
        // Return the file data if requested
        if ($_ci_return === TRUE) {
            $buffer = ob_get_contents();
            @ob_end_clean();
            return $buffer;
        }
        /*
         * Flush the buffer... or buff the flusher?
         *
         * In order to permit views to be nested within
         * other views, we need to flush the content back out whenever
         * we are beyond the first level of output buffering so that
         * it can be seen and included properly by the first included
         * template and any subsequent ones. Oy!
         */
        if (ob_get_level() > $this->_ci_ob_level + 1) {
            ob_end_flush();
        } else {
            $_ci_CI->output->append_output(ob_get_contents());
            @ob_end_clean();
        }
        return $this;
    }