function declaration pass by reference

[cupboy]

Can anyone show me what the function declaration would like in the non-deprecated "encouraged" way?
I can find no info on this.

; Whether to enable the ability to force arguments to be passed by reference
; at function call time. This method is deprecated and is likely to be
; unsupported in future versions of PHP/Zend. The encouraged method of
; specifying which arguments should be passed by reference is in the function
; declaration.

allow_call_time_pass_reference = Off

[Installer]

function my_func(& $my_var) {}

It's in the functions section in the manual.