Home > Backend Development > PHP Tutorial > 求助!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???

WBOY
Release: 2016-06-23 14:40:06
Original
1382 people have browsed it

本帖最后由 zx11307 于 2013-12-24 17:57:24 编辑

如题所述:
例如
function &ret_ref(){$var="php";return $var;}$v=&ret_ref();
Copy after login

函数前面带&和不带&有什么区别么?为什么要加个&


回复讨论(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(){  static $var;  if(empty($var)) $var="php";  return $var;}$v =& ret_ref();echo $v; //php$v = 'aaa';echo ret_ref(); //aaa
Copy after login
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template