php枚举指定路径所有文件速度很慢怎么解决？
php枚举指定路径所有文件速度很慢怎么解决？能不能不存到数据库中就行。
------解决思路----------------------
你可以第一次把所有文件遍历一遍，然后组成一个数组，变成json写在一个单独的文件中，如果目录有更新 就把这个json文件删掉重新生成，需要遍历的时候直接把json文件打开decode一下就好了
------解决思路----------------------
file_put_content
你先把你第一读出来的数组 json_encode 然后写入到一个文件 然后每次读取的时候 判断下这个文件的创建时间 如果在指定时间内 就读取这个json文件内容 如果不在时间内 就重新读取 重新生成
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