'Work out the include string and return it (without the quotes)'

def _getIncludePath(self, styles, text, p):

    if ((p < len(styles)) and (styles[p] == self.PHP_OPERATOR) and (text[p] == '(')):
        p += 1
    while (p < len(styles)):
        if (styles[p] in self.PHP_STRINGS):
            requirename = self._unquoteString(text[p])
            if requirename:
                return requirename
        p += 1
    return None
