How to strip the title from the string [:en]Black Brown[:de]Black Brown[:]?

Question

PHP

There is this line: [:en]Black Brown[:de]Black Brown[:]. What is an easy way to get 1 title Black Brown?

Answer 1

$str = '[:en]Black Brown[:de]Black Brown[:]';
preg_match('/\[:en\]([^(\[:)]*)/', $str, $matches);
$str_en = $matches[1] ?? '';
echo $str_en;

Answer 2

Replace all occurrences of \[.*?\] with an empty string

$str = '[:en]Black Brown[:de]Black Brown[:]';
$newStr = preg_replace('#\[:[a-z]*\]#is', '', $str);
var_dump($newStr); // 'Black BrownBlack Brown'

or, if readable words are needed, to a space, then remove whitespace characters from the beginning and end of the line (using the function trim())
Upd. I did not quite understand the task correctly ... What exactly should the result be? For what language? Or the first one that comes along?