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求助!声明函数时,函数名前面带个&是什么意思???

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2016-06-23 14:40:061396browse

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();

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

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