Question

How can I print the length of an array passed by reference in php. The variable that I will get is a reference variable. So how can I accomplish it?

Answer 1

The same way as printing the length of an array passed by value:

function print_count(&$array){
    echo count($array);
}

References in PHP are a means to access the same variable content by
different names. They are not like C pointers; for instance, you
cannot perform pointer arithmetic using them, they are not actual
memory addresses, and so on. Instead, they are symbol table aliases. Note that in PHP,
variable name and variable content are different, so the same content
can have different names.