Replace string in text file using PHP

user_1037871 0
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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;">

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);

How can I do it?

text file replace php
4 Answers
public function fileReplaceContent($path, $oldContent, $newContent)
{
    $str = file_get_contents($path);
    $str = str_replace($oldContent, $newContent, $str);
    file_put_contents($path, $str);
}

Using

fileReplaceContent('your file path','string you want to change', 'new string')
user_109152800
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