Something very strange happened because according to the user Touch, his method was working on his computer. Unfortunately it wasn't working on mine! So after a while thinking I came to the conclusion that I was over doing some process of replacement of tags. In order to confirm or not this theory of mine I decided do "back-engineer" Touch's method by erasing line by line and seeing what the result was. In the end I saw that my conclusion was correct, I was over doing process of tag replacement because this code:
$text2 = "../conteudos/start/text2.txt";
if (isset($_POST['body2'])) {
$newData = nl2br($_POST['body2']);
$handle = fopen($text2, "w");
fwrite($handle, $newData);
fclose($handle);
}
// ------------------------------------------------
if (file_exists($text2)) {
$myData2 = file_get_contents($text2);
$myData2 = $myData2;
}
worked in perfection. I can only think that this was due to I was using KCEditor...
A big thanks to all that answered, maing me think and helping me this way to achieve my goal!