How to Use JSON With AJAX?

Usually, you can use the global variable ajaxurl instead of any path using admin-ajax.php.

More importantly, the PHP function should echo the response before calling wp_die(). Because you haven’t called wp_die(), AJAX is probably waiting for more from PHP.

Hope this helps.

P.S. What is that 'json' string doing where the AJAX fail() function should be?

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