PowerShell: Copy the content of one file to other several files with regex

Admin 1
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people. I have in Folder1 a html file named file1.html that has this content:

Folder1

<!-- FLAGS_1 -->
      <div class="cautareField">
          <div align="right">
             <a href="https://neculaifantanaru.com/izolarea-cercetatorului-in-cursa-lunga-a-leadershipului.html">&nbsp; <a href="https://neculaifantanaru.com/fr/l-isolement-du-chercheur-dans-le-marathon-de-leadership.html">&nbsp; <a href="https://neculaifantanaru.com/en/the-flashing-of-a-mind-inclined-towards-the-infinite.html">
         </div>
        </div>
<!-- FLAGS -->

Folder2 (example of the content of all files, so only the links are different)

<!-- FLAGS_1 -->
      <div class="cautareField">
          <div align="right">
             <a href="https://neculaifantanaru.com/index.html">&nbsp; <a href="https://neculaifantanaru.com/fr/index.html">&nbsp; <a href="https://neculaifantanaru.com/en/index.html">
         </div>
        </div>
<!-- FLAGS -->

So the content between <!-- FLAGS_1 --> to <!-- FLAGS --> in file1.html needs be copied in all html files in folder 2 at the same <!-- FLAGS_1 --> to <!-- FLAGS --> place

powershell terminal
1 Answers
# Sourcefile contains text to insert
$sourcefile = "c:/Folder1/file1.html"
# Get content to insert
$sourceContent = Get-Content -Path $sourcefile  -Raw
# Get target files
$destinationFiles = Get-ChildItem -Path "c:/Folder2" -Filter "*.html";  
# Do for each file in destination folder
foreach ($file in $destinationFiles) {
    # Prepare regex
    $contentToInsert = [regex]::match($sourceContent,'(?ms)<!-- FLAGS_1 -->(.+)<!-- FLAGS -->').value
    # Get content of destination file
    $destinationContent = Get-Content $file.FullName -Raw
    # Replace the text in destination file content
    $destinationContent = $destinationContent -replace '(?ms)<!-- FLAGS_1 -->(.+)<!-- FLAGS -->',$contentToInsert
    # Write back destination file
    Set-Content -Path $file.FullName -Value $destinationContent -Encoding UTF8
} #end foreach file

Thank you, AndreasBaumgarten, who helped me here.

Admin1
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