！声明函数时，函数名前面带个&是什么意思？

求助！声明函数时，函数名前面带个&是什么意思？？？

本帖最后由 zx11307 于 2013-12-24 17:57:24 编辑 如题所述：
例如

<br />
function &ret_ref(){<br />
$var="php";<br />
return $var;<br />
}<br />
$v=&ret_ref();

函数前面带&和不带&有什么区别么？为什么要加个&

分享到： 更多

------解决方案--------------------
表示可以返回一个引用
不过你的这个例子表现不出来，这个可以

function &ret_ref(){<br />
  static $var;<br />
  if(empty($var)) $var="php";<br />
  return $var;<br />
}<br />
$v =& ret_ref();<br />
echo $v; //php<br />
$v = 'aaa';<br />
echo ret_ref(); //aaa<br />

Related labels：

amp nbsp ref var

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