URL Encode with Shell Script

url_encode.sh

#!/usr/bin/env bash
#
# Credits to Meleu @ https://meleu.sh/urlencode/
# Usage: urlencode "#" => will output "%23"

urlencode() {
    local LC_ALL=C
    local string="$*"
    local length="${#string}"
    local char

    for (( i = 0; i < length; i++ )); do
        char="${string:i:1}"
        if [[ "$char" == [a-zA-Z0-9.~_-] ]]; then
            printf "$char" 
        else
            printf '%%%02X' "'$char" 
        fi
    done
    printf '\n' # opcional
}

urlencode "$@"