错误：第一个参数应该是一个数组

Question

I have this code and no code before it that refers to any variables seen below. Yet I still can't find why I'm getting the error: "First argument should be an array in..."

$array = array("element here for reason");

function sortdata()
{
    $File = fopen("Names.txt", "r");

    //put each file line into an array element
    while(!feof($File))
    {
        array_push($array, fgets($File));
    }
}

Answer 1

$array is out of scope to the function. You can bring it into scope using global.

$array = ..;
function sortdata() {
    global $array;
    ...
}
sortdata();

Alternatively, you can pass it by reference into the function.

$array = ..;
function sortdata(&$array) {
    ...
}
sortdata($array);