Why is my PHP $_POST array empty after submitting a JSON form?

Why PHP $_POST Array Remains Empty After Form Submission

When encountering empty $_POST arrays despite successful form submissions, one must delve into the intricacies of data flow between the client and server. While $_POST typically captures data submitted via HTML forms, certain scenarios can render it empty.

The Culprit: JSON Content-Type

In instances where JSON is employed as the content-type for form data transmission, the $_POST array remains unpopulated. This behavior is a consequence of the way PHP handles different content-types.

Resolving the Issue

To rectify this issue and access the submitted data, you can employ the following solution:

$_POST = json_decode(file_get_contents("php://input"), true);

By decoding the JSON data directly from the input stream using file_get_contents("php://input"), we can manually populate the $_POST array with the submitted values.

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