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

It's a memory corruption issue (according to PHP dev team). Just throw in an assignment:

function foo(){
    $b = array_pop($arr = array("a","b","c"));
    return $b;
}
print_r(foo());

:

function foo(){
    $a = explode( '/' , 'a/b/c');
    $c = array_pop($arr = array_slice($a,-2,1));
    return $c;
}
print_r(foo());

The second produces an E_STRICT. You can handle that differently in your error handler if you wish (if you don't want to change those functions).