protected function isInlineDirective($rule)
    {
        foreach ($this->directiveArray() as $directive) {
            if (0 === strpos(mb_strtolower($rule), $directive . ':')) {
                return $directive;
            }
        }
        return false;
    }
protected function isInlineDirective($rule)
    {
        foreach ($this->directiveArray() as $directive) {
            if (0 === strpos(mb_strtolower($rule), $directive . ':')) {
                return $directive;
            }
        }
        return false;
    }
protected function isInlineDirective ( $ rule ) { foreach ( $ this -> directiveArray ( ) as $ directive ) { if ( 0 === strpos ( mb_strtolower ( $ rule ) , $ directive . ':' ) ) { return $ directive ; } } return false ; }
Check if the rule contains a inline directive

@param  string $rule
@return string|false
Check if the rule contains a inline directive