Why is my PHP JSON POST decoding failing, and how can I fix it?

Decoding JSON POST with PHP

While attempting to receive a JSON POST on a payment interface website, unexpected results emerge when decoding the data. Upon printing the contents of $_POST, an empty array is returned, signaling a missing or unparseable payload.

To remedy this, the following approaches were considered:

• Iterating over the $_POST array to display key-value pairs yielded no output.
• Decoding a specific $_POST['operation'] string without success.
• Attempting to decode data directly from php://input resulted in a NULL return value.

Utilizing json_decode(file_get_contents('php://input'), true) remained fruitless, as NULL persisted in the output.

Upon review of the provided JSON format, it was noted that the "operation" key was missing. This could explain why attempts to access this specific key were unsuccessful.

Solution:

Rectify the spelling of "operation" in either the JSON payload or the PHP script to ensure correct key matching during decoding. Additionally, consider echoing the JSON string from php://input to inspect its contents for debugging purposes.

By implementing these suggestions, it should be possible to decode the JSON POST data successfully.

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