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

array_pop() changes that value passed to it which is where the error is coming from. A function cannot be changed. In other words, you need to assign the array to a variable first (ref: manual), and then run array_pop().

The code you need is this:

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

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Edit: Both functions you mentioned have the same problem. Assign the array to a variable and pass the variable to array_pop().