如何解析单引号字符串中的字符？

To get a double quoted string (which I cannot change) correctly parsed I have to do following:

$string = '15 Rose Avenue
 Irlam
 Manchester'; 
$string = str_replace('
', "
", $string);
print nl2br($string); // demonstrates that the 
's are now linebreak characters

So far, so good. But in my given string there are characters like \xC3\xA4. There are many characters like this (beginning with \x..) How can I get them correctly parsed as shown above with the linebreak?

You can use

$str = stripcslashes($str);

You can escape a \ in single quotes:

$string = str_replace('\
', "
", $string);

But you're going to have a lot of potential replaces if you need to do \\xC3, etc.... best use a preg_replace_callback() with a function(callback) to translate them to bytes