dty3416
2017-10-23 13:37
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PHP：file_get_contents（）强制从服务器而不是缓存中读取文件

I am trying to read my constants from a JSON file using

$const = file_get_contents('/myfolder/const.json');

Problem is this will always read the file from cache and not from my local XAMPP server. During development phase, this file is dynamic due to edits and I end up clearing the browser cache everytime there's a change in the file. How can I force to read from the server always (latency in doing this during development phase is fine. I will switch to normal post deployment - how?)? Any help is appreciated.

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我试图使用 

 <从JSON文件中读取常量 code> $ const = file_get_contents（'/ myfolder / const.json'）; 
   
 
 
问题是这将始终从缓存中读取文件，而不是从本地XAMPP读取 服务器。 在开发阶段，由于编辑，此文件是动态的，每当文件发生更改时，我最终都会清除浏览器缓存。 我怎么能强制总是从服务器读取（在开发阶段这样做的延迟很好。我将切换到正常的部署后 - 如何？）？ 任何帮助表示赞赏。
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3条回答 默认 最新

  • douxia6163 2017-10-23 13:42
    最佳回答

    There are a couple of "accepted" solutions.

    The first is to add a timestamp to the file like 

    $const = file_get_contents('/myfolder/const.json?'.date("Ymdhis"));

    You can also try this

    header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");

    I suggest adding one of these, clearing your cache and then try to run the code. Adding the timestamp to the file has worked for me, when I add it before I start devving, and reloading the page.

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