Removing string inside brackets

Question

Good day!

I would like some help in removing strings inside the square brackets and including the square brackets.

The string looks like this:

$str

Answer 1

$str = "Lorem ipsum dolor
 [ Context are found on www.example.com ] 
some text here. Text here. [test] Lorem ipsum dolor.";
$str = preg_replace('~\[[^]]*?www\.example\.com[^]]*\]~si', "", $str);
var_dump($str);

OUTPUT

string(83) "Lorem ipsum dolor
  
some text here. Text here. [test] Lorem ipsum dolor."

PS: It will work with line broken in multiple lines.