Only variables can be passed by reference

Question

I had the bright idea of using a custom error handler which led me down a rabbit hole.

Following code gives (with and without custom error handler): Fatal er

Answer 1

I think that now (since php 5) it should be:

function &foo(){ //NOTICE THE &
    $b=array_pop(array("a","b","c"));
    return $b;
}
print_r(foo());

and

function &foo(){ //NOTICE THE &
    $a=explode( '/' , 'a/b/c');
    $c=array_pop(array_slice($a, $b = -2, $c = 1)); //NOW NO DIRECT VALUES ARE PASSED IT MUST BE VARIABLES
    return $c;
}
print_r(foo());

but i'm just a begginer :)