php - Assigning and passing a reference variable in function - 


function test(&$a) {     $a = $a + 3;  }

if assign variable first , call it: $a = 3; test($a); echo $a; //it output 6

but if test($a = 3); echo $a; //it return 3

why that? doesnt' reference variable in second function call modify 6 well?

turn on strict standards see:

only variables should passed reference

you should not expect second example work @ all. fact seems coincidence, though php document it.


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