Answers for "string trim whitespace"

remove whitespaces

//Extenion function
fun String.removeWhitespaces() = replace(" ", "")

// Uses
var str = "This is an example text".removeWhitespaces()

println(str)

Trim whitespaces around string, but not inside of string.

$cleanStr = trim(preg_replace('/\s\s+/', ' ', str_replace("\n", " ", $str)));