import re

def get_urls(string):
    '''
    A function that returns all URLs from a string.
    '''
    regex = re.compile(
        r'((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[.\!\/\\w]*))?)',
        re.IGNORECASE)

    return [x[0] for x in re.findall(regex, string)]