PHP如何利用ajax获取内容时全局变量不起作用？

Question

So I have this code snippet.

function get_box_ajax() {
    global $box;

    $box = get_box(); // creates box object

    ob_start();
    get_template( '/filepath/content.php' );
    $output = ob_get_clean();
}

// in the content.php file

global $box;

<form action="<?php echo box_url( $box->url ); ?>" method="post"> // error on this line
...
</form>

So with this code, I am getting a non-object error on the call to $box->url. Take note this is done via ajax.

So I thought in my ajax function I have already globalized $box and that will take but it doesn't seem to work? Any thoughts?

Answer 1

Set box to null before the function. There's no reference in the global scope

$box = null;
function get_box_ajax() {
    global $box;

    $box = get_box();

Change the start to that