ArrayAccess（数组式访问）接口

时间：2011-05-16 15:50:51 来源：站内作者：潘春会

($this->container);
    }

    public function current() {
      return current($this->container);
    }

    public function key() {
      return key($this->container);
    }

    public function next() {
      return next($this->container);
    }

    public function valid() {
      return $this->current() !== false;
    }

    public function count() {
   return count($this->container);
    }

}

?>

Now you can using it like any other array.

<?php

   $array = new ArrayOfColorModel();
   foreach ($array as $model) {
      var_export($model);
   }

   // OR

   for($i=0;$i<count($array);$i++){
      var_export($array[$i]);
   }

?>

AryehGregor+php-comment at gmail dot com (09-Jan-2009 09:33)

Note that at least in PHP 5.1, objects implementing ArrayAccess cannot return objects by reference.  See http://bugs.php.net/bug.php?id=34783 .  If you have code like 



<?php

$x = &$y[0];

?>



then this will (as far as I can tell) *always* fail unless $y is a real array -- it cannot work if $y is an object implementing ArrayAccess.  If your offsetGet() function returns by reference, you get the fatal error "Declaration of MyClass::offsetGet() must be compatible with that of ArrayAccess::offsetGet()".  If you try to have it return by value, however, you get the (contradictory) fatal error "Objects used as arrays in post/pre increment/decrement must return values by reference", at least in my version of PHP.
 7/8   首页 上一页 5 6 7 8 下一页 尾页

来顶一下

返回首页

推荐资讯

如何找出DHCP地址池里	国内常用的DNS列表
Linux邮件服务器软件比	学用纯CSS打造可折叠树

相关文章

栏目更新

栏目热门