package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?:\[|\G(?!^))\K[^][](?=[^][]*])`)
var str = `$lang['activate_deactivate'] = "Activate / Deactivate";
$lang['invalid_username'] = "Invalid username";
$lang['you_must_enter_username'] = "You must enter username";
$lang['invalid_user_name'] = "Invalid username";
$lang['user_deactivated'] = "User has been deactivated";
$lang['user_not_deactivated'] = "User could not be deactivated";`
var substitution = "$0█"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/