PHP mb_ereg_replace - I have to turn to Habr, I don't understand the problem?

Question

PHP

Hello.
I've run into a problem that I don't understand. I need to write data from a textarea to the database with a line break [br], I can't. I tried a lot of ways including multibytes, although they should not be connected in any way here.
$message sink:

Это мой уникальный контент,\r\nЭто перенос строки,\r\nА это запрос к БД \' OR \'

Should be converted to

Это мой уникальный контент,[br]Это перенос строки,[br]А это запрос к БД \' OR \'

Tried the following ways, I list them all.

// самый совершенный вариант относительно UDF-8
$text = mb_ereg_replace("\r\n|\r|\n", "[br]", $message);

// Из документации PHP
$order   = array("\r\n", "\n", "\r");
$replace = '[br]';
$text = str_replace($order, $replace, $message);

// Теоретически самый правильный вариант
$text = nl2br ($message);

// Другие варианты со стек оверфлова заключающиеся в реализации mb_str_replace

Windows platform
XAMPP
PHP 5.3.8
All work in UTF-8 from HTML to PHP.
What am I doing wrong? I have the same line in $text. Is it supposed to be like this or am I a failure?
PS: it works flawlessly! I've run out of options. I do not know what to do. PS2: Something happened with the backlight on Habré. All [br] should be considered as a <..> tag, because naturally I will write statics in the database, but this is not the point.
$text = mb_ereg_replace("мой", "[br]", $message);

Answer 1

And in the text you have exactly \r\n, and not the slash_symbol+r(n)?

Answer 2

Sorry, problem solved. For those who suddenly stumbled.
Up to this point, with the $message line, I mocked this mysql_real_escape_string function - it replaces all special characters, including line breaks. Therefore, it is impossible to find them later. We need to look for them as \\r and \\n.
The problem is that I really screwed up with the fact that XDEBUG still showed \r\n and they were already there as characters, and not as special characters.