使用PHP替换文本文件中的字符串 [英] Replace string in text file using PHP

问题描述

我需要打开一个文本文件并替换一个字符串.我需要这个

I need to open a text file and replace a string. I need this

Old String: <span id="$msgid" style="display: block;">
New String: <span id="$msgid" style="display: none;">

这是我到目前为止的内容，但是除了多余的空格外，我看不到文本文件中的任何更改.

This is what I have so far, but I don't see any changes in the text file besides extra white spaces.

$msgid = $_GET['msgid'];

$oldMessage = "";
$deletedFormat = "";

// Read the entire string
$str = implode("\n", file('msghistory.txt'));

$fp = fopen('msghistory.txt', 'w');

// Replace something in the file string - this is a VERY simple example
$str = str_replace("$oldMessage", "$deletedFormat", $str);

fwrite($fp, $str, strlen($str));
fclose($fp);

我该怎么办?

推荐答案

这项工作是

$msgid = $_GET['msgid'];

$oldMessage = '';

$deletedFormat = '';

//read the entire string
$str=file_get_contents('msghistory.txt');

//replace something in the file string - this is a VERY simple example
$str=str_replace($oldMessage, $deletedFormat,$str);

//write the entire string
file_put_contents('msghistory.txt', $str);

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