Help! When declaring a function, the function name is preceded by an ampersand ???

Source: Internet
Author: User
Help! When declaring a function, the function name is preceded by an ampersand ??? This post was last edited by zx11307 at 17:57:24 on

As described in:
For example
Function & ret_ref () {$ var = "php"; return $ var ;}$ v = & ret_ref ();

What is the difference between "with" and "Without" in front of a function? Why add one &


Reply to discussion (solution)

Indicates that a reference can be returned.
However, this example cannot be shown.

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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