今天在项目中的一个需求就是：在前端显示后台传递的json字符串问题，看似简单的一个需求花了点时间，我的方案如下，不排除还有其他的方法，但是时间有限，以后再优化吧
后台代码：
$book_info = Db::name('project')->where('identify', $param['identify'])->find();
$array = [];
$array['book_id'] = $book_info['project_id'];
$array['book_name'] = $book_info['project_name'];
$array['identify'] = $book_info['identify'];
$array['description'] = $book_info['description'];
$array['doc_count'] = $book_info['doc_count'];
$array['comment_count'] = $book_info['comment_count'];
$array['create_time'] = $book_info['create_time'];
$json = json_encode($array, 320);
$this->assign('json', $json);前端代码：
window.book = {$json|raw};
320确保中文正常显示，raw函数确保json中的双引号正常显示
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