使用 PHP 在平面文件中查找和替换值 [英] find and replace values in a flat-file using PHP

问题描述

我认为已经有一个关于此的问题，但我找不到.也许解决方案太简单了......无论如何，我有一个平面文件并希望让用户根据名称更改值.我已经整理出使用 fopen('a') 模式创建新的名称+值对，使用 jQuery 发送带有 newValue 和 的 AJAX 调用新名称.但是说内容看起来像这样:

I'd think there was a question on this already, but I can't find one. Maybe the solution is too easy... Anyway, I have a flat-file and want to let the user change the values based on a name. I've already sorted out creating new name+value-pairs using the fopen('a') mode, using jQuery to send the AJAX call with newValue and newName. But say the content looks like this:

host|http:www.stackoverflow.com
folder|/questions/
folder2|/users/

现在我想更改 folder 值.所以我将folder 作为oldName 和/tags/ 作为newValue 发送.覆盖该值的最佳方法是什么?列表中的顺序无关紧要，名称将始终在左侧，后跟 |(管道)、值和 new-line.

And now I want to change the folder value. So I'll send in folder as oldName and /tags/ as newValue. What's the best way to overwrite the value? The order in the list doesn't matter, and the name will always be on the left, followed by a |(pipe), the value and then a new-line.

我的第一个想法是读取列表，将其存储在一个数组中，在所有 [0] 中搜索 oldName，然后更改 [1] 属于它，然后将其写回文件.但我觉得有更好的方法吗?有任何想法吗?也许 正则表达式?

My first thought was to read the list, store it in an array, search all the [0]'s for oldName, then change the [1] that belongs to it, and then write it back to a file. But I feel there is a better way around this? Any ideas? Maybe regex?

推荐答案

对整个文件使用 str_replace() 一个非常简单的方法:

A very easy way would it be to use str_replace() on the whole file:

// read the file
$file = file_get_contents('filename.csv');
// replace the data
$file = str_replace('folder|oldValue', 'folder|newValue', $file);
// write the file
file_put_contents('filename.csv', $file);

一次只能作为一个用户使用该文件.但是数据库总是一个更好的主意.如果您需要 CSV，最好有一个额外的 DB 到 CSV 脚本，而不仅仅是一个 CSV 文件.

That should work as only one user the file at a time. But a database is always a better idea. If you need CSV, it's better to have an additional DB to CSV script than only a CSV file.

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