Convert BR to Newline

Technique #1

function br2newline( $input ) {
     $out = str_replace( "<br>", "\n", $input );
     $out = str_replace( "<br/>", "\n", $out );
     $out = str_replace( "<br />", "\n", $out );
     $out = str_replace( "<BR>", "\n", $out );
     $out = str_replace( "<BR/>", "\n", $out );
     $out = str_replace( "<BR />", "\n", $out );
     return $out;
}

Converts a break tag to a newline – no matter what kind of HTML is being processed.

Technique #2

function br2nl( $input ) {
 return preg_replace('/<br(\s+)?\/?>/i', "\n", $input);
}