Removing code added to htaccess with insert_with_markers

If you know the exact code that is inserted, then read the htaccess file with a function that contains fread command, and do a search for your inserted text, replacing the found text with an empty string. Then fwrite the text to the htaccess file.

If you are just looking for a way to remove the # BEGIN MARKER / # END MARKER text, then use the same process.