如何在cakephp 2.x中搜索后在搜索字段中填充旧值

public function search() {
    // 获取搜索条件
    $conditions = array();
    if ($this->request->is('post')) {
        $keyword = $this->request->data['Post']['keyword'];
        if (!empty($keyword)) {
            $conditions['Post.title LIKE'] = '%' . $keyword . '%';
        }
    }
    
    // 设置搜索条件
    $this->set('conditions', $conditions);
    
    // 执行搜索查询
    $this->paginate = array(
        'conditions' => $conditions,
        'limit' => 10
    );
    $posts = $this->paginate('Post');
    
    // 将搜索结果传递给视图
    $this->set('posts', $posts);
}

<?php echo $this->Form->create('Post', array('url' => array('action' => 'search'))); ?>
    <?php echo $this->Form->input('keyword', array('value' => $this->request->data('Post.keyword'))); ?>
    <?php echo $this->Form->submit('Search'); ?>
<?php echo $this->Form->end(); ?>

Router::connect('/posts/search', array('controller' => 'posts', 'action' => 'search'));